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caltech.edu favicon caltech.edu

Excellent Practice34
Improvement Could be Made9
Critical Issues to Attend8
Jun 27, 2020 10:21 AM

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Recommended Actions

  • Set meta keywords.
  • Create one H1 element for your page, put the most important keywords in.
  • Use more straight forward terms, avoid using too much jargon in the page content.
  • Create a XML sitemap for your site.
  • Move the 25 inline css components to an external style sheet file.
  • Reduce number of links to other pages.
  • Implement HTTP compression for your site.
  • Implement browser caching for your site.
  • Add more text for meta description and ensure it contains 70 to 160 characters.
  • Use HTML headings(H1 - H6) and inline emphasis tags (<EM><B><I><EM><STRONG>).
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Detailed Reviews

Related Category
Most related categories of this website.

athletic   college   comics   institute   library   museum   science   university  

Title
Home | www.caltech.edu

Words count: 4    Unique Words: 4    Length: 36 characters
[ To optimize the page title, Use this SEO Title Optimizer ]

Excellent! the title contains 1-12 words, and within 10-70 characters!

The title will be displayed in search engine results in the form of a direct link to the site.

Tips:
1. ideally, the title should contain 10 to 70 characters, including spaces. (Google displays up to 70 characters in the title, and takes into account only the first 12 words.)
2. put the most important and relevant keywords in the title, try not to repeat any word.
3. each individual page should have a unique title.
Description
www.caltech.edu home page

Words count: 5    Length: 25 characters
[ To optimize the page description, Use this SEO Meta Description Optimizer ]


The description is too short!

Meta Descriptions provide concise explanations of the contents of web pages, that are commonly used by search engines on search result pages to display preview snippets for a given page.

Tips:
1. it is best to keep meta descriptions between 70-160 characters.
2. a readable, compelling description using important keywords can draw a much higher click-through rate of searchers to the given web page.
3. avoid keyword stuffing, ensure each page has its own unique description.
Google SERP Preview
Home | www.caltech.edu www.caltech.edu/
www.caltech.edu home page

[ To optimize this Google SERP preview, Use this Google SERP Optimizer ]

This is how your site looks like in Google Search Result Page.

an optimized SERP snippet will have a higher click through rate.

Tips:
1. make sure the title is clear, simple, straight to the point.
2. make sure the description is relevant and properly summarized the page content.
Keywords
Words count: 0    Length: 0 characters    keyword phrases count : 0

Meta Keywords is not set.
[ To optimize the meta keywords, Use this SEO Meta Keywords Optimizer ]

Meta keywords should not be ignored, though they are not a major ranking factor for most of search engines nowadays. A Meta keywords tag is supposed to be a brief and concise list of the most important themes of your page

Tips:
1. keep your list of keywords or keyword phrases down to 10 - 20 unique words or phrases.
2. separate the words or phrases using a comma (you do not need to leave a space between words separated by commas).
3. do not repeat words or phrases.
4. put your most important word or phrases at the beginning of your list.
Keywords Cloud
This keywords cloud gives your an idea of what are those important keywords appears in your website.

academic  admissions  aid  apply  caltech  campus  center  chemical  click  engineering  events  graduate  history  hole  institute  interactions  june  laboratory  learning  life  light  mathematics  medicine  network  news  observation  observatory  online  open  physics  publications  read  science  social  student  studies  submenu  technology  theoretical  undergraduate 

Top 20 Keywords
Total Terms Count: 1,549

It is nice! the word density is quite ok.

Top 20 terms occurance and density
KeywordIn DomainIn TitleIn DescriptionIn Heading In Body Density
caltech 55 3.55%
center 49 3.16%
institute 27 1.74%
science 21 1.36%
submenu 14 0.90%
open 14 0.90%
observatory 12 0.77%
engineering 12 0.77%
technology 11 0.71%
events 11 0.71%
admissions 10 0.65%
academic 10 0.65%
campus 9 0.58%
laboratory 9 0.58%
read 9 0.58%
news 8 0.52%
student 8 0.52%
aid 8 0.52%
june 8 0.52%
physics 7 0.45%

keyword density can be used as a factor in determining whether a web page is relevant to a specified keyword or keyword phrase.


Tips:
1. the optimum keyword density to be 1.0% - 3.0%. Using a keyword more than that could be considered search spam.
2. overuse of keywords, a practice called keyword stuffing, will cause a web page to be penalized.
Highlight
<H1><H2><H3><H4><H5><H6><B><U><I><EM><STRONG>Total
05940000130031

Excellent! The page is using HTML headings (<H1> - <H6>) and inline emphasis tags (<EM><B><I><EM><STRONG>)

<H2>

(5)
Featured Online Events
Life at Caltech
Jet Propulsion Laboratory
Connect With Us
Matters

<H3>

(9)
Did You Know?
Becoming Caltech, 1910–1930: Presentations from the Archives, Session 3
von Kármán Lecture - A Day in the Life of the Deep Space Network
Becoming Caltech, 1910–1930: Presentations from the Archives, Session 5
NASA's TESS, Spitzer Missions Discover a World Orbiting a Unique Young Star
David Ignacio Fager
Katherine de Kleer
Ralph Adolphs
Nayla Abney

<H4>

(4)
@ScienceNews 18h
@Caltech 21h
@Caltech 23h
@Caltech 1d
<I> (13)


HTML headings and emphasis tags are the most basic forms to indicate important content.

Tips:
1. use your keywords in the headings and make sure the first level heading (<H1>) includes the most important keywords.
2. never duplicate the title tag content in the heading tags.
3. for more effective SEO, use only one <H1> tag per page
Reading Level
0

The page text content is a bit too difficult to be read and understood!

Ensure your page content text can be read and understood by most of your site visitors. not too difficult nor too simple.

Tips:
1. a score below 30, indicates the text content is too difficult to be read and understood.
2. a sore above 80, may suggest that the site is lack of in-depth and expertise of its topics (low quality content).
3. an optimal reading level score shall be 50-70.
Language
en Excellent! the website declared its language in use.

the detected language is : en

Declare the language in use can help search engine to better understand and rendering your page, especially when special characters are encountered.
Page Encoding
utf-8 Excellent! the website declared its character encoding.

Declare the character encoding can help search engine to better rendering your page, especially when it comes to
non-asii characters.
Favicon
Excellent! the website has a shortcut favicon image.

RSS
the website does not have a RSS Feed.

Robots.txt
http://caltech.edu/robots.txt Excellent! the website has a Robots.txt file to regulate search engine crawlers access.

Robots.txt file can be used to regulate access of search engine crawlers, properly configured robots.txt file can help
crawlers to better understand your website.

Tips:
1. grand robots access to those pages you wish them to crawl.
2. restrict access to those pages you do not wish search engines to see and crawl.
XML Sitemap
XML Sitemap is not presented for the site.
[ To generate XML sitemap, Use this XML Sitemap Generator ]

Sitemap helps search engine crawler to identify your website pages.

Tips:
1. ensure all your important pages are listed in the sitemap.
2. ensure to indicate the frequency of change and importance of each url.
3. inform search engines of the location/URL of your sitemap (eg, For Google, you can set the website sitemap location through Google Webmaster management panel).
Loading Time
1.66 seconds - 19.96 Kb/s

Excellent! the loading speed is pretty fast!

Estimated loading time for different internet connections
Modem
(56Kbits/s)
Mobile/HSDPAM
(7.2Mbits/s)
ADSL
(8Mbits/s)
Cable
(30Mbits/s)
Optical Fibre
(100Mbits/s)
4.73 s 0.04 s 0.03 s 0.01 s 2.65 ms

Site speed is becoming an crucial ranking factor. Slow page loading is one of the biggest complains of web users. If the loading time is too long, you may need to check your server, network, or system codes and structure.

Tips:
1. ideal loading time is less than 1 seconds, if it take more than 5 seconds to load your site, likely users will run out of patience, so do search engines.
2. improve your SEO by optimizing your website to have a small size and faster responding server.
Total Size
33 Kb (33,136 bytes)

Excellent! the page size is just nice, that is within 30K-150K!

Page size affects the speed of your website.

Tips:
1. try to keep you page size between 30K-150K
2. put javascript and style sheet in separate files, and link them to the main page.
3. use optimized images for web and set up your server with gzip for downloading
Text To Code Ratio
Total Size Text Size HTML Code Size Text/HTML Code Ratio
33 Kb (33,136 bytes) 13 Kb (12,541 bytes) 21 Kb (20,595 bytes) 60.89 %


Excellent! the text to html code ratio is just nice, that is within 15%-70%!

the ratio of text to HTML code should always be above 15% for good SEO gain,
it is below 15% then that means that your website probably needs more text content.

Tips:
1. a ratio between 25% and 70% is ideal, when it goes beyond than that, the page might run the risk of being considered as spam. As long as the content is relevant and gives essential information, it is a plus point to have more of it.
2. improve your SEO by adding more relevant text to your pages and also increasing your keyword density.
Flash
Excellent! No flash component is detected on this page.

Flash content can not be properly indexed by search engines, and normally flash file is large in size, which slow down the loading of your page.

Tips:
1. avoid flash content whenever possible if you wish to have a fast and SEO friendly website.
Frame
Excellent! No frame is detected on this page.

Framesets and individual frames could cause problem for search engine to crawl your pages

Tips:
1. avoid frames whenever possible.
2. search engines do not like frames.
3. use iframe instead if you really have no choice.
Inline CSS
25 Inline CSS components are detected on this page.

It is a good practice to move inline CSS rules into an external CSS file in order to make your page lighter and increasing the text to code ratio.

Tips:
1. move inline css rules to external css file.
2. separate style from html.
Nested Table
Excellent! No nested table is detected on this page (nested table : 0, total table : 0)

nested tables could slow down page rendering and lead to bad user experience.

Tips:
1. avoiding <table> for your page layout.
2. using <div> instead of <table>.
Plain Text Email
Excellent! No Plain Text Email is detected on this page.

Redirect Count
2 redirections were detected for loading this page.

Using HTTPS
Excellent! HTTPS is used for your page.

WWW Resolve
Excellent! the websites https://www.caltech.edu:443/ and http://caltech.edu are resolved to the same url :https://www.caltech.edu:443/

Search Engines treat URLs with or without "www" as two different records.

Tips:
1. edit your .htaccess file and permanently redirect one to the other (eg redirect www.mysite.com to mysite.com).
URL Rewrite
Non SEO Friendly URLs
http://caltech.edu/campu...-life-events/master-calendar/filter?past=0&locations=750


You may use url rewrite techniques to make these 1 urls to be SEO friendly.

clean, short and relevant URLs are favoured by users and search engines

Tips:
1. use url rewrite to turn dynamic pages with query parameters into seo friendly static pages.
2. put your important keywords in the url.
3. good urls are not only user friendly but also seo friendly.
Underscore In URL
URLs with underscore
http://caltech.edu/docum...nts/10/Periodic_Table_of_Caltech.pdf
http://caltech.edu/documents/16/Innovation_and_Impact_R1.pdf
http://caltech.edu/docum...nts/10/Periodic_Table_of_Caltech.pdf
http://caltech.edu/documents/16/Innovation_and_Impact_R1.pdf


You have 4 Urls with underscore.

Search Engines treat hyphen as word separator, they do not treat underscore as word separator.


Tips:
1. use hyphen "-" instead of underscore "_" to optimize your page url.
2. help search engines to better understand your url, eventually will benefit your page`s ranking.
Links
Internal Links
(link to pages within this domain)
External Links
(link to pages on other websites)
Total
242 31 273


Too many links (273), it may be considered as spam!

Internal Links (link to pages within this domain) - 242
URL Anchor Text
http://caltech.edu/#contentSkip to main content
http://caltech.edu/about/visit/plan-your-visitVisit
https://hr.caltech.edu/careersCareers
https://access.caltech.edu/Access
http://caltech.edu/quick-links-facultyfor Faculty
http://caltech.edu/quick-links-studentsfor Students
http://caltech.edu/quick-links-stafffor Staff
http://caltech.edu/quick-links-alumnifor Alumni
https://directory.caltech.edu/Directory
http://caltech.edu/campus-life-events/caltech-todayCaltech Today
https://www.alumni.caltech.edu/Alumni
https://breakthrough.caltech.eduGive
http://caltech.edu/
http://caltech.edu/aboutAbout
http://caltech.edu/about/at-a-glanceAt a Glance
http://president.caltech.edu/President
http://provost.caltech.edu/Provost
http://bot.caltech.edu/Board of Trustees
http://caltech.edu/about/legacy/history-milestonesHistory & Milestones
http://caltech.edu/about/legacy/historic-awards-honorsHistoric Awards & Honors
http://archives.caltech.edu/Caltech Archives
http://caltech.edu/map/historyInteractive History Map
http://caltech.edu/about/newsNews
http://caltech.edu/documents/3/this-is-caltech.pdfThis is Caltech
https://magazine.caltech.edu/Caltech Magazine
http://caltech.edu/docum...nts/10/Periodic_Table_of_Caltech.pdfPeriodic Table of Caltech
http://caltech.edu/documents/16/Innovation_and_Impact_R1.pdfInnovation and Impact
http://caltech.edu/docum...s/17/Exploration-and-Achievement.pdfExploration and Achievement
http://caltech.edu/about/visit/directionsDirections
http://caltech.edu/about/visit/campus-mapsCampus Maps
http://parking.caltech.edu/ParkingParking
http://caltech.edu/about/visit/toursTours
http://caltech.edu/about/offices-departmentsAdministrative Offices & Depar...
http://caltech.edu/researchResearch
http://www.bbe.caltech.edu/Biology and Biological Enginee...
http://www.cce.caltech.edu/Chemistry and Chemical Enginee...
http://eas.caltech.edu/Engineering & Applied Science
http://www.gps.caltech.edu/Geological & Planetary Science...
http://www.hss.caltech.edu/Humanities and Social Sciences
http://pma.caltech.edu/Physics, Mathematics and Astro...
http://caltech.edu/research/jplJet Propulsion Laboratory
http://sfp.caltech.edu/programsStudent Research
http://caltech.edu/research/centers-institutesCenters & Institutes
http://innovation.caltech.edu/Technology Transfer & Corporat...
http://researchadministration.caltech.edu/Sponsored Research
http://caltech.edu/research/research-facilitiesResearch Facilities
http://caltech.edu/research/faculty-listingFaculty Listing
http://caltech.edu/academicsAcademics
https://www.deans.caltech.edu/Undergraduate Studies
http://www.gradoffice.caltech.edu/Graduate Studies
http://online.caltech.edu/coursesOnline Education
https://ctme.caltech.edu/Executive Education
http://ctlo.caltech.edu/Teaching, Learning, & Outreach
http://www.registrar.caltech.edu/Registrar
http://www.catalog.caltech.edu/Catalog
http://caltech.edu/academics/resources/academic-calendarAcademic Calendar
https://www.library.caltech.edu/Library
http://international.caltech.edu/International Offices
http://career.caltech.edu/Career Development
http://caltech.edu/admissions-aidAdmissions & Aid
http://www.admissions.caltech.edu/Apply
http://www.admissions.caltech.edu/content/affordCost & Aid
http://www.gradoffice.caltech.edu/admissionsApply
http://www.gradoffice.caltech.edu/financialsupportFunding & Aid
http://caltech.edu/campus-life-eventsCampus Life & Events
http://caltech.edu/campus-life-events/master-calendarCalendar
http://caltech.edu/campus-life-events/caltech-todayCaltech Today
http://events.caltech.edu/Public Programming / CaltechLi...
http://pva.caltech.edu/Performing & Visual Arts
http://housing.caltech.edu/Housing
http://dining.caltech.edu/Dining
http://wellness.caltech.edu/Wellness Services
http://diversity.caltech.edu/Diversity Center
http://security.caltech.edu/Security
http://caltech.edu/campus-life-events/emergency-informationEmergency Information
http://caltech.edu/aboutAbout
http://caltech.edu/researchResearch
http://caltech.edu/academicsAcademics
http://caltech.edu/admissions-aidAdmissions & Aid
http://caltech.edu/campus-life-eventsCampus Life & Events
https://breakthrough.caltech.eduGive
http://caltech.edu/about/visit/plan-your-visitVisit
https://hr.caltech.edu/careersCareers
https://access.caltech.edu/Access
http://caltech.edu/quick-links-facultyfor Faculty
http://caltech.edu/quick-links-studentsfor Students
http://caltech.edu/quick-links-stafffor Staff
http://caltech.edu/quick-links-alumnifor Alumni
https://directory.caltech.edu/Directory
http://caltech.edu/campus-life-events/caltech-todayCaltech Today
https://www.alumni.caltech.edu/Alumni
http://caltech.edu/about/at-a-glanceAt a Glance
http://president.caltech.edu/President
http://provost.caltech.edu/Provost
http://bot.caltech.edu/Board of Trustees
http://caltech.edu/about/legacy/history-milestonesHistory & Milestones
http://caltech.edu/about/legacy/historic-awards-honorsHistoric Awards & Honors
http://archives.caltech.edu/Caltech Archives
http://caltech.edu/map/historyInteractive History Map
http://caltech.edu/about/newsNews
...

External Links (link to pages on other websites) - 31
URL Anchor Text
http://gocaltech.com/landing/indexAthletics & Recreation
https://www.caltechy.org/Caltech Y
http://gocaltech.com/landing/indexAthletics & Recreation
https://www.caltechy.org/Caltech Y
https://www.jpl.nasa.gov/news/news.php?feature=7685
https://www.jpl.nasa.gov/news/news.php?feature=7685NASA's TESS, Spitzer Missions ...
https://www.jpl.nasa.gov/news/news.php?feature=7685Read Full Article   >
http://www.keckobservatory.orgW. M. Keck Observatory
https://solarfuelshub.org/Joint Center for Artificial Ph...
http://www.theswartzfoundation.org/research_a.aspSloan-Swartz Center for Theore...
http://www.scsn.org/Southern California Seismic Ne...
http://www.facebook.com/californiainstituteoftechnologyFacebook
http://twitter.com/caltechTwitter
https://www.instagram.com/caltecheduInstagram
http://www.youtube.com/caltechYouTube
https://www.coursera.org/caltechCoursera
https://www.edx.org/school/caltechxedXthe edX logo is comprised o...
https://caltech.us5.list...490ec46ef24d22d04308c6&id=36a33f2adaSubscribe Now
https://www.sciencenews....-have-created-surprising-flare-lighthttps://t.co/nA94GMeaVD
https://twitter.com/i/web/status/1276606744333090816https://t.co/z0pwLQs41H
https://twitter.com/Caltech_LHC@Caltech_LHC
https://twitter.com/CERN@CERN
https://twitter.com/search?q=%23LHC#LHC
https://twitter.com/CMSExperiment@CMSExperiment
https://twitter.com/i/web/status/1276574562088628226https://t.co/9nLsM8SBaA
https://twitter.com/CedarsSinai@CedarsSinai
https://twitter.com/i/web/status/1276291025166905345https://t.co/iZokAz5r46
https://www.instagram.com/p/CByVIYDnczz/#EssentialCaltech
https://www.instagram.com/p/CBWHCmcHUEY/#Caltech2020
https://www.instagram.com/p/CBV4MSln8iE/
https://www.instagram.com/p/CBLrMtznzE6/#Caltech2020 ...

reasonable number of links (below 100) per page will give a better user experience.


Tips:
1. keep the number of links per page below 100.
2. having more than 100 links in a single page will lead to a bad user experience, and it possibly runs into the risk of been considered as spam.
3. search engines may not follow all the links if you have too many of them in a single page.
Images
Total Images Alt Present Alt Missing
117 116 1


1 images do not have Alt values.

Image URL - 117
URL ALT Text
https://www.facebook.com/tr?id=216652915781085&ev=PageView&noscript=1
http://caltech.edu/static/theme-v7.0/img/icon-chevron-grey-550.pngDown arrow
http://caltech.edu/static/theme-v7.0/img/icon-chevron-orange.pngRight arrow
http://caltech.edu/static/core/img/caltech-new-logo.pngCaltech Logo
http://caltech.edu/static/theme-v7.0/img/icon-search.pngOpen search form
http://caltech.edu/static/theme-v7.0/img/menu-burger.pngMain Menu
http://caltech.edu/static/theme-v7.0/img/icon-search.pngOpen search form
https://web-prod-storage...KMpkK5Ue%2FHhR%2B%2BBD7TmGXko4e1wg9ZU&Expires=1593282105Artist's concept of a supermas...
https://web-prod-storage...KMpkK5Ue%2FHhR%2B%2BBD7TmGXko4e1wg9ZU&Expires=1593282105Artwork showing a black hole m...
https://web-prod-storage...KMpkK5Ue%2FHhR%2B%2BBD7TmGXko4e1wg9ZU&Expires=1593282105Battleship Potemkin still
http://caltech.edu/static/airspace/img/icon-chevron-left.pngPrevious
http://caltech.edu/static/airspace/img/icon-chevron-right.pngNext
http://caltech.edu/static/airspace/img/icon-chevron-left.pngprev
http://caltech.edu/static/airspace/img/icon-chevron-right.pngnext
https://web-prod-storage...KMpkK5Ue%2FHhR%2B%2BBD7TmGXko4e1wg9ZU&Expires=1593282105members of the Caltech women's...
https://web-prod-storage...KMpkK5Ue%2FHhR%2B%2BBD7TmGXko4e1wg9ZU&Expires=1593282105students talking
https://web-prod-storage...KMpkK5Ue%2FHhR%2B%2BBD7TmGXko4e1wg9ZU&Expires=1593282105Bechtel Residence
https://web-prod-storage...KMpkK5Ue%2FHhR%2B%2BBD7TmGXko4e1wg9ZU&Expires=1593282105student painting
https://web-prod-storage...KMpkK5Ue%2FHhR%2B%2BBD7TmGXko4e1wg9ZU&Expires=1593282105student working on air ambulan...
https://web-prod-storage...KMpkK5Ue%2FHhR%2B%2BBD7TmGXko4e1wg9ZU&Expires=1593282105student working in lab
https://web-prod-storage...KMpkK5Ue%2FHhR%2B%2BBD7TmGXko4e1wg9ZU&Expires=1593282105members of the Caltech women's...
https://web-prod-storage...KMpkK5Ue%2FHhR%2B%2BBD7TmGXko4e1wg9ZU&Expires=1593282105students talking
https://web-prod-storage...KMpkK5Ue%2FHhR%2B%2BBD7TmGXko4e1wg9ZU&Expires=1593282105Bechtel Residence
https://web-prod-storage...KMpkK5Ue%2FHhR%2B%2BBD7TmGXko4e1wg9ZU&Expires=1593282105student painting
https://web-prod-storage...KMpkK5Ue%2FHhR%2B%2BBD7TmGXko4e1wg9ZU&Expires=1593282105student working on air ambulan...
https://web-prod-storage...KMpkK5Ue%2FHhR%2B%2BBD7TmGXko4e1wg9ZU&Expires=1593282105student working in lab
https://web-prod-storage...KMpkK5Ue%2FHhR%2B%2BBD7TmGXko4e1wg9ZU&Expires=1593282105students in dorm room
https://web-prod-storage...KMpkK5Ue%2FHhR%2B%2BBD7TmGXko4e1wg9ZU&Expires=1593282105Annenberg and Moore Labs
https://web-prod-storage...KMpkK5Ue%2FHhR%2B%2BBD7TmGXko4e1wg9ZU&Expires=1593282105student working in lab
https://web-prod-storage...KMpkK5Ue%2FHhR%2B%2BBD7TmGXko4e1wg9ZU&Expires=1593282105aerial view of Millikan Pond
https://web-prod-storage...KMpkK5Ue%2FHhR%2B%2BBD7TmGXko4e1wg9ZU&Expires=1593282105engineering competition
https://web-prod-storage...KMpkK5Ue%2FHhR%2B%2BBD7TmGXko4e1wg9ZU&Expires=1593282105students at table
https://web-prod-storage...KMpkK5Ue%2FHhR%2B%2BBD7TmGXko4e1wg9ZU&Expires=1593282105Caltech student working
https://web-prod-storage...KMpkK5Ue%2FHhR%2B%2BBD7TmGXko4e1wg9ZU&Expires=1593282105Cahill Center for Astronomy an...
https://web-prod-storage...KMpkK5Ue%2FHhR%2B%2BBD7TmGXko4e1wg9ZU&Expires=1593282105group of students studying
https://web-prod-storage...KMpkK5Ue%2FHhR%2B%2BBD7TmGXko4e1wg9ZU&Expires=1593282105students working together
https://web-prod-storage...KMpkK5Ue%2FHhR%2B%2BBD7TmGXko4e1wg9ZU&Expires=1593282105Linde + Robinson Laboratory fo...
https://web-prod-storage...KMpkK5Ue%2FHhR%2B%2BBD7TmGXko4e1wg9ZU&Expires=1593282105Fleming Cannon
https://web-prod-storage...KMpkK5Ue%2FHhR%2B%2BBD7TmGXko4e1wg9ZU&Expires=1593282105students working together
https://web-prod-storage...KMpkK5Ue%2FHhR%2B%2BBD7TmGXko4e1wg9ZU&Expires=1593282105Gates Thomas Laboratory
http://caltech.edu/static/airspace/img/icon-chevron-left.pngPrevious
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https://web-prod-storage...KMpkK5Ue%2FHhR%2B%2BBD7TmGXko4e1wg9ZU&Expires=1593282105Fluid injection
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https://web-prod-storage...KMpkK5Ue%2FHhR%2B%2BBD7TmGXko4e1wg9ZU&Expires=1593282105illustration of gravitational ...
https://web-prod-storage...KMpkK5Ue%2FHhR%2B%2BBD7TmGXko4e1wg9ZU&Expires=1593282105flat lens
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https://web-prod-storage...KMpkK5Ue%2FHhR%2B%2BBD7TmGXko4e1wg9ZU&Expires=1593282105history collage
https://web-prod-storage...KMpkK5Ue%2FHhR%2B%2BBD7TmGXko4e1wg9ZU&Expires=1593282105seismograph image on map
https://web-prod-storage...KMpkK5Ue%2FHhR%2B%2BBD7TmGXko4e1wg9ZU&Expires=1593282105A photo showing the Los Angele...
https://web-prod-storage...KMpkK5Ue%2FHhR%2B%2BBD7TmGXko4e1wg9ZU&Expires=1593282105An artist's rendering of gut b...
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https://web-prod-storage...KMpkK5Ue%2FHhR%2B%2BBD7TmGXko4e1wg9ZU&Expires=1593282105Community Seismic Network (CSN...
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https://web-prod-storage...KMpkK5Ue%2FHhR%2B%2BBD7TmGXko4e1wg9ZU&Expires=1593282105overlay of whole brain fibers
https://web-prod-storage...KMpkK5Ue%2FHhR%2B%2BBD7TmGXko4e1wg9ZU&Expires=1593282105Owens Valley Radio Observatory
https://web-prod-storage...KMpkK5Ue%2FHhR%2B%2BBD7TmGXko4e1wg9ZU&Expires=1593282105Hixon Writing Center, Caltech
https://web-prod-storage...KMpkK5Ue%2FHhR%2B%2BBD7TmGXko4e1wg9ZU&Expires=1593282105clumping fibers
https://web-prod-storage...KMpkK5Ue%2FHhR%2B%2BBD7TmGXko4e1wg9ZU&Expires=1593282105Design of brain
https://web-prod-storage...KMpkK5Ue%2FHhR%2B%2BBD7TmGXko4e1wg9ZU&Expires=1593282105Caltech Submillimeter Observat...
https://web-prod-storage...KMpkK5Ue%2FHhR%2B%2BBD7TmGXko4e1wg9ZU&Expires=1593282105Huntington Library
https://web-prod-storage...KMpkK5Ue%2FHhR%2B%2BBD7TmGXko4e1wg9ZU&Expires=1593282105Theoretical Cosmology and Phys...
https://web-prod-storage...KMpkK5Ue%2FHhR%2B%2BBD7TmGXko4e1wg9ZU&Expires=1593282105Chajnantor Observatory
https://web-prod-storage...KMpkK5Ue%2FHhR%2B%2BBD7TmGXko4e1wg9ZU&Expires=1593282105Feynman diagrams on wall
https://web-prod-storage...KMpkK5Ue%2FHhR%2B%2BBD7TmGXko4e1wg9ZU&Expires=1593282105Center for Catalysis and Chemi...
https://web-prod-storage...KMpkK5Ue%2FHhR%2B%2BBD7TmGXko4e1wg9ZU&Expires=1593282105Cahill Center for Astronomy an...
https://web-prod-storage...KMpkK5Ue%2FHhR%2B%2BBD7TmGXko4e1wg9ZU&Expires=1593282105Crellin Laboratory of Chemistr...
https://web-prod-storage...KMpkK5Ue%2FHhR%2B%2BBD7TmGXko4e1wg9ZU&Expires=1593282105information science
https://web-prod-storage...KMpkK5Ue%2FHhR%2B%2BBD7TmGXko4e1wg9ZU&Expires=1593282105clouds
https://web-prod-storage...KMpkK5Ue%2FHhR%2B%2BBD7TmGXko4e1wg9ZU&Expires=1593282105map: Caltech/MIT Voting Techno...
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https://web-prod-storage...KMpkK5Ue%2FHhR%2B%2BBD7TmGXko4e1wg9ZU&Expires=1593282105Earth from space
https://web-prod-storage...KMpkK5Ue%2FHhR%2B%2BBD7TmGXko4e1wg9ZU&Expires=1593282105multidimensional data visualiz...
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https://web-prod-storage...KMpkK5Ue%2FHhR%2B%2BBD7TmGXko4e1wg9ZU&Expires=1593282106Baxter Hall, Caltech
https://web-prod-storage...KMpkK5Ue%2FHhR%2B%2BBD7TmGXko4e1wg9ZU&Expires=1593282106arial photo of Caltech
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https://web-prod-storage...KMpkK5Ue%2FHhR%2B%2BBD7TmGXko4e1wg9ZU&Expires=1593282106Ralph Adolphs
https://web-prod-storage...KMpkK5Ue%2FHhR%2B%2BBD7TmGXko4e1wg9ZU&Expires=1593282106Nayla Abney
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https://web-prod-storage...KMpkK5Ue%2FHhR%2B%2BBD7TmGXko4e1wg9ZU&Expires=1593282106microscope
https://web-prod-storage...KMpkK5Ue%2FHhR%2B%2BBD7TmGXko4e1wg9ZU&Expires=1593282106beakers and test tube
https://web-prod-storage...KMpkK5Ue%2FHhR%2B%2BBD7TmGXko4e1wg9ZU&Expires=1593282106cogs
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http://caltech.edu/static/core/img/caltech-new-logo.pngCaltech Logo
https://scontent-sea1-1....gram.com&oh=4058cd2f9c1ba360625e83b6a8c353c9&oe=5F1DC880Instagram post 1
https://scontent-sea1-1....gram.com&oh=b6019c4c69e006de8250fbda5f0d88e5&oe=5F1E722DInstagram post 2
https://scontent-sea1-1....gram.com&oh=db056aa91329c5f6d6e3aa5ad9204323&oe=5F1BB6B0Instagram post 3
https://scontent-sea1-1....gram.com&oh=a003f09198535e68f38f5ac71f145f75&oe=5F1CA9A6Instagram post 4
http://caltech.edu/static/theme-v7.0/img/flame.pngCaltech Torch
http://caltech.edu/static/core/img/caltech-new-logo.pngCaltech Logo
http://caltech.edu/static/theme-v7.0/img/icon-footerpin.pngmap marker


search engines cannot `see` images, proper Alt content will help them to better understand and index images.

Tips:
1. always add alt attributes to images. Alt is mandatory for accessibility and for valid XHTML.
2. words used within an image`s Alt attribute should be its text equivalent and convey the same information.
3. use a human-readable caption and descriptive text around the image.
CSS
Style Block In Same Page Links to External Style Files Total
0 4 4


Too many (4) external style sheet files , it will slow down the downloading.

Links To External Stylesheet Files - 4
Stylesheet URL rel type
http://caltech.edu/static/theme-v7.0/css/bootstrap-4.1.0.cssstylesheettext/css
http://caltech.edu/static/wagtailfontawesome/css/wagtailfontawesome.cssstylesheettext/css
http://caltech.edu/static/airspace/css/airspace.cssstylesheettext/css
http://caltech.edu/static/theme-v7.0/css/theme.cssstylesheettext/css

Script
Scripts Block In Same Page Links to External Script Files Total
15 13 28


Too many (13) external scripts files , it will slow down the downlaoding.

Links To External Script Files - 13
Script URL Type
https://ajax.googleapis.com/ajax/libs/jquery/3.3.1/jquery.min.js
http://caltech.edu/static/theme-v7.0/js/modernizr-3.5.0-custom.js
https://cdnjs.cloudflare...ax/libs/mathjax/2.7.5/MathJax.js?config=TeX-MML-AM_CHTML
https://cdnjs.cloudflare.com/ajax/libs/underscore.js/1.9.1/underscore-min.js
http://caltech.edu/static/theme-v7.0/js/clamp.js
http://caltech.edu/static/bootstrap-4.1.0/dist/js/bootstrap.bundle.js
http://caltech.edu/static/airspace/js/airspace.js
http://caltech.edu/static/core/js/news.js
http://caltech.edu/static/core/js/notifications.js
http://caltech.edu/static/core/js/blocks.js
http://caltech.edu/static/theme-v7.0/js/theme.js
http://caltech.edu/static/link_farms/js/link_farms.js
http://caltech.edu/static/www/js/www.js

put scripts together and link them from an external files rather then put them in the same file as the main page.

Tips:
1. reduce the use of in-page scripts, put them in separate files and link them in.
2. reduce the number of external script files, it will help browser to make lesser number of http requests from the server.
3. optimize or compress the script files to have smaller size and faster loading.
Blog Or News Release
Link to Blog / News Release Page
http://caltech.edu/about/newsNews
https://www.jpl.nasa.gov/news/news.php?feature=7685


Excellent! we have found blog linked to your site.

Having a blog is a great way to provide fresh content and retain users, search engines favour it too.


Tips:
1. regularly update your blog and provide fresh and quality content.
2. relevant blogs of your website topics, generate more credits in the eyes of your visitors, as well as search engines.
DMOZ Listing
Yes

Excellent! the website is listed in the DMOZ open directory. DMOZ Open Directory Project

Google Analytics
UA-11248958-1 Excellent! the website implements Google Analytics.

Google Page Rank
8 Excellent! the website has a high page rank (8/10).

8
0 - 1 2 - 3 4 - 10
Poor Good Excellent
Links From Root Domains
102
Excellent! You do have a lot of root domains (102) linked to your site caltech.edu.

102
< 20 21 - 50 > 51
Poor Good Excellent


Number of backlinks from some other root domains is an indicator of domain authority, the more backlinks your site has, the higher its domain authority, which leads to a higher chance of better ranking.

Tips:
1. make it easy for others to link to your site, provide the code if possible.
2. links from older domains are more powerful than links from new domains.
3. links from .edu and .gov generally have a higher value.
Social Engagement
Your site has an excellent social media engagement!

  Facebook Likes 1,116
  Facebook Shares 948
  Facebook Comments 702
  Tweets 0
  LinkedIn 20

Social Media Integration
Excellent! your site is well integrated with social media networks.

Facebook Pagehttp://www.facebook.com/californiainstituteoftechnology
Twitter Accounthttp://twitter.com/caltech
Google+ PageNot Found


Trustworthiness
93

Excellent! the website has a good Trustworthiness Score (93/100).

93
0 - 19 20 - 39 40 - 59 60 - 79 80 - 100
Very Poor Poor Unsatisfactory Good Excellent


Users are concerned about the safety of their online transactions. Trustworthiness rating is based on real user ratings and that tells you how much other users trust this site, so do the serch engines. note: this trustworthiness score is provided by WOT (Web of Trust).

Tips:
1. pay attention to the look and design of your site, many people look for visual cues when assessing a site`s credibility
2. make your site easy to use, sites that are easy to navigate are perceived as being more trustworthy.
3. make it easy for user to contact you, users will be more comfortable and feel more secured shall they need to get in touch with you.
Child Safe
93 Excellent! the website has a good Child Safe Score (93/100).

93
0 - 19 20 - 39 40 - 59 60 - 79 80 - 100
Very Poor Poor Unsatisfactory Good Excellent


Safe Browsing
Safe! the site caltech.edu is NOT currently listed as suspicious, most-likely it is clean from malware and phining code [ verify this by Google Safe Browsing ]

Ensure that your site is malware free and does not cause harm to users` computers.

Tips:
1. do not put virus, malicious worms, adwares, trojans, spywares and suspicious phishing code in your server.
2. take suspicious behaviours seriously, have a regular check-up and monitor closely of your server`s log files.
3. if your site is black-listed by Google as suspicious, clean it up before requesting for a review.
Traffic Rank
13,079th most visited website in the world.
4,473th most visited website in United States  

your site has an excellent high traffic rank in the world.
Websites On Same Server
Excellent! You do have very few domains (1 - caltech.edu) hosted on the same server as caltech.edu (ip : 52.43.89.188).

Too many domains hosted on the same server is an indicator that you are not really serious about your website, and your site will have a higher chance to be surrounded by bad neighbours.

Tips:
1. the fewer domains hosted on the same server/ip the better.
2. avoid shared hosting whenever possible, especially when there are already hundreds or thousands of sites are hosted on the same server.
3. dedicated ip or resources for your site not only do good to your site visitors but also favoured by search engines.
Server Location
your server (IP : 52.43.89.188) is located at United States  
the most site visitors come from United States  

Excellent! your server is located close to most of your site visitors.
HTTP Compression
No

your website server does not support HTTP Compression.

Caching
No

your website server does not support Caching.

Server Signature
Excellent! the website server signature is off.

A secure and safe server is not only good for your site visitors but also good for search engines.

Tips:
1. server software version information can be utilized by malicious visitors to attack your server.
2. by turning off the server signature, you actually have made your server a little bit more secure.
3. for Apache server - edit the apache2.conf or the .htaccess file to turn server signature off.
Domain Age
34 years, 185 days old ( 1st registered on : 1986-01-06 )


[ To check the detailed whois info, Use this Whois Lookup Tool ]

excellent, the domain age is old enough.

Domain Expires
1 year, 21 days from today ( expires on : 2021-07-31 )


[ To check the detailed whois info, Use this Whois Lookup Tool ]

domain is expiring soon.

Domain Info
caltech.edu ( 11 characters )

Domain Registrar : EDUCASE

[ To check the detailed whois info, Use this Whois Lookup Tool ]

Domain Created On Last Modified On Expires On
1986-01-06 2019-12-21 2021-07-31
34 years, 185 days old 0 years, 201 days ago 1 year, 21 days from today
34 years, 185 days old


Domain Name Servers used by caltech.edu
DNS Name IP Address
caltech.edu52.26.125.194


You have a nice choice of domain name, which is of a right length (11 characters).

domain name choice and domain age are crucial for SEO.

Tips:
1. keep the domain name short and relevant to the content, which will be easier to be remembered and related to.
2. older domain tends to be more trustworthy.
3. register a domain for more than 1 year, and search engine will think it is a serious business.

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