Home.web.cern.ch - SEO Checker

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Overview of the SEO Check
Meta information
56% 
Page quality
64% 
Page structure
29% 
Link structure
17% 
Server
54% 
External factors
100% 
SEO Score
Response time
0.08 s
File size
154.80 kB
Words
803
Media files
3
Number of links
171 internal / 31 external

Task list of SEO Improvements

Meta specifications

Title
(Critically important)
Home | CERN
The page title is too short. (129 pixels of 580 max pixel length) Optimize title
There are no duplicate words in the title
Meta description
(Critically important)
CERN, the European Organization for Nuclear Research, is one of the world’s largest and most respected centres for scientific research. Its business is fundamental physics, finding out what the Universe is made of and how it works.
The meta description is too long: 1430 pixels from max. 1000 pixels. Optimize description
Crawlability
(Critically important)
There are no problems in accessing the website.
Canonical URL
(Important)
https://home.cern/
The canonical link points to a different domain.
Language
(Somewhat important)
Language detected in text: en
Language defined in HTML: en
Server location: United States of America
The following language is defined by HTML: en
Alternate/Hreflang Links
(Somewhat important)
The alternate link to the page itself is missing.
Other meta tags
(Somewhat important)
There is no rel next meta tag on this page.
There is no rel prev meta tag on this page.
Domain
(Somewhat important)
The domain is no subdomain.
The domain length is good.
The domain does not contain non-latin characters.
Page URL
(Somewhat important)
No parameters were found in the URL.
No session ID was found in the URL.
The URL does not have too many subdirectories.
Charset encoding
(Somewhat important)
The charset encoding (UTF-8) is set correctly.
Doctype
(Nice to have)
The doctype HTML 5 is set correctly.
The doctype is placed at first in the HTML code.
Favicon
(Nice to have)
The favicon is linked correctly.

Meta tags

NameValue
descriptionCERN, the European Organization for Nuclear Research, is one of the world’s largest and most respected centres for scientific research. Its business is fundamental physics, finding out what the Universe is made of and how it works.
keywordsphysics, CERN, Large Hadron Collider, LHC, high-energy physics, particles, science
GeneratorDrupal 10 (https://www.drupal.org)
MobileOptimizedwidth
HandheldFriendlytrue
viewportwidth=device-width, initial-scale=1.0
langen
charsetutf-8

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Page quality

Content
(Critically important)
Only 2 paragraph/s was/were found on this page.
This page contains 803 words. That's ok.
22.5% of the text are stop words.
Words from the H1 heading are used in the page content.
The page contains a listing, which indicates a good text layout.
No placeholders texts or images were found.
There are no duplicates on the site.
The average number of words per sentence of 23.5 words is good.
Frames
(Critically important)
This page does not use a frameset.
Mobile optimization
(Somewhat important)
No Apple touch icon is specified.
This page loads 57 JavaScript files. This may affect the load time negatively.
A viewport "width=device-width, initial-scale=1.0" is provided.
Bold and strong tags
(Somewhat important)
Some tags are too long. With 98 characters this one is longer than 70 characters:
"the higgs boson, predicted six decades ago, was first observed on 4 july 2012 at cern. read more →"
Image SEO
(Somewhat important)
Alt text (alternative text) is correctly used on all found images.
Social Networks
(Nice to have)
There are only a few social sharing widgets on the page. Make your website popular in social networks with social sharing widgets.
Additional markup
(Nice to have)
No additional page markup was found.
HTTPS
(Somewhat important)
This website uses HTTPS to protect privacy and integrity of the exchanged data.
All included files are also transferred via HTTPS.

Media list

URLAlt attributeTitle
/sites/default/files/logo/cern-logo.pnghome
...ges/pkatyaya/1209226_01-A5-at-72-dpi.jpgimg
.../inline-images/lburdych/Cern70logo_0.pngCERN70

Page structure

H1 heading
(Critically important)
CERN Accelerating science
Too many H1 headings
Headings
(Important)
Some headings occur twice on the page.
There are 48 headings on the page. The amount of headings should be in a more proper relation to the amount of text.

Heading structure

Heading levelContent
H1 CERN Accelerating science
H1 Featured resources
H1 Latest News
H1 Explore CERN
H1 Upcoming events
H1 Key Achievements
H2 CERN
H2 Science
H2 Find us
H2 CERN & You
H2 General Information
H3 CERN and Pro Helvetia announce the artists se...
H3 Students from Estonia, Japan and the USA win ...
H3 Arts at CERN awarded European Commission’s S+...
H3 ATLAS dives deeper into di-Higgs
H3 CERN Courier Jul/Aug 2024
H3 High-Luminosity LHC images
H3 LHC Facts and Figures
H3 Breakthrough in rapid cooling for BASE antipr...
H3 AMBER releases its first results
H3 ATLAS probes uncharted territory with LHC Run...
H3 CERN and Pro Helvetia announce the artists se... Duplicate text
H3 LHCb investigates the properties of one of ph...
H3 Digital archaeology: new LEP data now availab...
H3 Less hungry magnets for the experiments of th...
H3 LHCb investigates the rare Σ+→pμ+μ- decay
H3 Going the extra mile to squeeze supersymmetry...
H3 CERN70: Green light for LEP
H3 Plan your CERN visit
H3 Take an immersive tour of CERN's accelerators
H3 Explore CERN's educational resources
H3 CERN and the environment
H3 Technology from CERN to society
H3 *** Cancelled*** Visit Point Training: LEIR/LINAC2 (no trainings/vi...
H3 Introduction to silicon pixel detectors
H3 Introduction to silicon pixel detectors Duplicate text
H3 Introduction to silicon pixel detectors Duplicate text
H3 Introduction to silicon pixel detectors Duplicate text
H3 Introductory lecture on gaseous detector in particular for Micro Pa...
H3 Visit Point Training: AD
H3 CERN openlab Summer Student Lightning Talks (1/2)
H3 Meet the authors and editors of 'New Challenges and Opportunities i...
H3 The Higgs boson
H3 The Large Hadron Collider
H3 Antimatter
H3 The birth of the Web
H3 W boson
H3 Z boson
Some internal links have dynamic parameters. All internal URLs, which are not marked as nofollow, should not contain dynamic parameters.
Some anchor texts are used more than once.
26 links don't have an anchor text.
The number of internal links is ok.
None of the anchor texts is too long.
There are too many external links (31) on this page.

Found links on this page

LinkAttributesAnchor text
https://home.web.cern.ch/Anchor Skip to main content
https://home.cern/External CERN Accelerating science
A-TITLE CERN
https://home.cern/user/login?d...External Sign in
https://cern.ch/directoryExternal Directory
A-TITLE Search CERN resources and browse the directory
https://home.web.cern.ch/IMG-ALT home
A-TITLE Home
https://home.web.cern.ch/aboutKnow more
/about/who-we-areWho we are
/about/who-we-are/our-missionOur Mission
/about/who-we-are/our-governanceOur Governance
/about/who-we-are/our-governan...Our Member States
/about/who-we-are/our-historyOur History
/about/who-we-are/our-peopleOur People
/about/what-we-doWhat we do
/about/what-we-do/fundamental-...Fundamental research
/about/what-we-do/our-impactContribute to society
/about/what-we-do/environmenta...Environmentally responsible research
/about/what-we-do/bring-nation...Bring nations together
/about/what-we-do/inspire-educateInspire and educate
/resources/faqsFast facts and FAQs
/about/key-achievementsKey Achievements
/science/physics/higgs-bosonThe Higgs Boson
/science/physics/w-boson-sunsh...The W boson
/science/physics/z-bosonThe Z boson
/science/accelerators/large-ha...The Large Hadron Collider
/science/computing/birth-webThe Birth of the web
/science/physics/antimatterAntimatter
/news/news/cern/cern-and-pro-h...No Text
/news/news/cern/cern-and-pro-h...CERN and Pro Helvetia announce the artists se...
A-TITLE CERN and Pro Helvetia announce the artists selected for the Connect India residency
/news/news/cern/students-eston...No Text
/news/news/cern/students-eston...Students from Estonia, Japan and the USA win ...
A-TITLE Students from Estonia, Japan and the USA win the 11th edition of Beamline for Schools
/news/news/cern/arts-cern-awar...No Text
/news/news/cern/arts-cern-awar...Arts at CERN awarded European Commission’s S+...
A-TITLE Arts at CERN awarded European Commission’s S+T+ARTS Grand Prize for Innovative Collaboration
/news/news/physics/atlas-dives...No Text
/news/news/physics/atlas-dives...ATLAS dives deeper into di-Higgs
A-TITLE ATLAS dives deeper into di-Higgs
/news?audience=23Latest news
/news?audience=23News
/news?topic=1114Accelerators
/news?topic=1118At CERN
/news?topic=1116Computing
/news?topic=1115Engineering
/news?topic=1117Experiments
/news?topic=1119Knowledge sharing
/news?topic=1113Physics
https://home.web.cern.ch/eventsEvents
/cern-communityCERN Community
/news?audience=24News and announcements
/news?type=45Official communications
/tags/events-cernText duplicate Events
/scientistsScientists
/news?audience=19Text duplicate News
https://home.web.cern.ch/pressPress Room
/news?audience=22Media News
/press/resourcesResources
/press/contactContact
https://home.web.cern.ch/scienceText duplicate Know more
/science/physicsText duplicate Physics
/science/physics/antimatterText duplicate Antimatter
/science/physics/dark-matterDark matter
/science/physics/early-universeThe early universe
/science/physics/higgs-bosonThe Higgs boson
/science/physics/standard-modelThe Standard Model
/science/physics+ More
/science/acceleratorsText duplicate Accelerators
/science/accelerators/accelera...CERN's accelerators
/science/accelerators/antiprot...The Antiproton Decelerator
/science/accelerators/large-ha...Text duplicate The Large Hadron Collider
/science/accelerators/high-lum...High-Luminosity LHC
/science/acceleratorsText duplicate + More
/science/engineeringText duplicate Engineering
/science/engineering/accelerat...Accelerating: radiofrequency cavities
/science/engineering/pulling-t...Steering and focusing: magnets and superconductivity
/science/engineering/vacuum-em...Circulating: ultra-high vacuum
/science/engineering/cryogenic...Cooling: cryogenic systems
/science/engineering/powering-...Powering: energy at CERN
/science/engineeringText duplicate + More
/science/computingText duplicate Computing
/science/computing/data-centreThe CERN Data Centre
/science/computing/gridThe Worldwide LHC Computing Grid
/science/computing/cern-openlabCERN openlab
/science/computing/open-source...Open source for open science
/science/computing/birth-webThe birth of the web
/science/computingText duplicate + More
/science/experimentsText duplicate Experiments
/science/experiments/aliceALICE
/science/experiments/atlasATLAS
/science/experiments/cmsCMS
/science/experiments/lhcbLHCb
/science/experimentsText duplicate + More
/resources/courier/physics/cer...No Text
/resources/courier/physics/cer...CERN Courier Jul/Aug 2024
A-TITLE CERN Courier Jul/Aug 2024
/resources/image/accelerators/...No Text
/resources/image/accelerators/...High-Luminosity LHC images
A-TITLE High-Luminosity LHC images
/resources/brochure/knowledge-...No Text
/resources/brochure/knowledge-...LHC Facts and Figures
A-TITLE LHC Facts and Figures
/resourcesSee all resources
/resources?topic=1114Text duplicate Accelerators
/resources?topic=1118Text duplicate At CERN
/resources?topic=1116Text duplicate Computing
/resources?topic=1115Text duplicate Engineering
/resources?topic=1117Text duplicate Experiments
/resources?topic=1119Text duplicate Knowledge sharing
/resources?topic=1113Text duplicate Physics
/resources?type=62360 image
/resources?type=53Annual report
/resources?type=56Brochure
/resources/bulletin/cern/cern-...Bulletin
/resources?type=52Courier
/resources?type=59Image
/resources?type=61Video
/resourcesText duplicate + More
/resources?audience=24CERN community
/resources?audience=21Educators
/resources?audience=23General public
/resources?audience=17Industry
/resources/audience/resources-...Media
/resources?audience=19Text duplicate Scientists
/resources?audience=20Students
/resourcesText duplicate + More
https://home.web.cern.ch/en
https://home.web.cern.ch/frfr
https://cern70.cern/New window External IMG-ALT CERN70
https://cern.ch/higgs-bosonExternal read more →
/news/news/experiments/breakth...No Text
/news/news/experiments/breakth...Breakthrough in rapid cooling for BASE antipr...
A-TITLE Breakthrough in rapid cooling for BASE antiprotons
/news/news/physics/amber-relea...No Text
/news/news/physics/amber-relea...AMBER releases its first results
A-TITLE AMBER releases its first results
/news/news/physics/atlas-probe...No Text
/news/news/physics/atlas-probe...ATLAS probes uncharted territory with LHC Run...
A-TITLE ATLAS probes uncharted territory with LHC Run 3 data
/news/news/cern/cern-and-pro-h...No Text
/news/news/cern/cern-and-pro-h...Text duplicate CERN and Pro Helvetia announce the artists se...
A-TITLE CERN and Pro Helvetia announce the artists selected for the Connect India residency
/news/news/physics/lhcb-invest...No Text
/news/news/physics/lhcb-invest...LHCb investigates the properties of one of ph...
A-TITLE LHCb investigates the properties of one of physics’ most puzzling particles
/news/news/computing/digital-a...No Text
/news/news/computing/digital-a...Digital archaeology: new LEP data now availab...
A-TITLE Digital archaeology: new LEP data now available to all
/news/news/engineering/less-hu...No Text
/news/news/engineering/less-hu...Less hungry magnets for the experiments of th...
A-TITLE Less hungry magnets for the experiments of the future
/news/news/physics/lhcb-invest...No Text
/news/news/physics/lhcb-invest...LHCb investigates the rare Σ+→pμ+μ- decay
A-TITLE LHCb investigates the rare Σ+→pμ+μ- decay
/news/news/physics/going-extra...No Text
/news/news/physics/going-extra...Going the extra mile to squeeze supersymmetry...
A-TITLE Going the extra mile to squeeze supersymmetry out of CMS data
https://home.web.cern.ch/newsView all news
/news/series/cern70/cern70-gre...No Text
/news/series/cern70/cern70-gre...CERN70: Green light for LEP
A-TITLE CERN70: Green light for LEP
https://visit.cern/External No Text
https://visit.cern/External Plan your CERN visit
A-TITLE Plan your CERN visit
/science/accelerators/accelera...No Text
/science/accelerators/accelera...Take an immersive tour of CERN's accelerators
A-TITLE Take an immersive tour of CERN's accelerators
https://educational-resources....External Subdomain No Text
https://educational-resources....External Subdomain Explore CERN's educational resources
A-TITLE Explore CERN's educational resources
/about/what-we-do/environmenta...No Text
/about/what-we-do/environmenta...CERN and the environment
A-TITLE CERN and the environment
/about/what-we-do/our-impactNo Text
/about/what-we-do/our-impactTechnology from CERN to society
A-TITLE Technology from CERN to society
/events/cancelled-visit-point-...*** Cancelled*** Visit Point Training: LEIR/LINAC2 (no trainings/vi...
A-TITLE *** Cancelled*** Visit Point Training: LEIR/LINAC2 (no trainings/visits from 26.07.-16.09. due to construction work)
https://indico.cern.ch/export/...New window External Subdomain No Text
/events/introduction-silicon-p...Introduction to silicon pixel detectors
A-TITLE Introduction to silicon pixel detectors
https://indico.cern.ch/export/...New window External Subdomain No Text
/events/introduction-silicon-p...Text duplicate Introduction to silicon pixel detectors
A-TITLE Introduction to silicon pixel detectors
https://indico.cern.ch/export/...New window External Subdomain No Text
/events/introduction-silicon-p...Text duplicate Introduction to silicon pixel detectors
A-TITLE Introduction to silicon pixel detectors
https://indico.cern.ch/export/...New window External Subdomain No Text
/events/introduction-silicon-p...Text duplicate Introduction to silicon pixel detectors
A-TITLE Introduction to silicon pixel detectors
https://indico.cern.ch/export/...New window External Subdomain No Text
/events/introductory-lecture-g...Introductory lecture on gaseous detector in particular for Micro Pa...
A-TITLE Introductory lecture on gaseous detector in particular for Micro Pattern Gas Detectors in the GDD laboratory.
https://indico.cern.ch/export/...New window External Subdomain No Text
/events/visit-point-training-adVisit Point Training: AD
A-TITLE Visit Point Training: AD
https://indico.cern.ch/export/...New window External Subdomain No Text
/events/cern-openlab-summer-st...CERN openlab Summer Student Lightning Talks (1/2)
A-TITLE CERN openlab Summer Student Lightning Talks (1/2)
https://indico.cern.ch/export/...New window External Subdomain No Text
/events/meet-authors-and-edito...Meet the authors and editors of 'New Challenges and Opportunities i...
A-TITLE Meet the authors and editors of 'New Challenges and Opportunities in Physics Education'
https://indico.cern.ch/export/...New window External Subdomain No Text
https://home.web.cern.ch/eventsView all events
/science/physics/higgs-bosonNo Text
/science/physics/higgs-bosonText duplicate The Higgs boson
A-TITLE The Higgs boson
/science/accelerators/large-ha...No Text
/science/accelerators/large-ha...Text duplicate The Large Hadron Collider
A-TITLE The Large Hadron Collider
/science/physics/antimatterNo Text
/science/physics/antimatterText duplicate Antimatter
A-TITLE Antimatter
/science/computing/birth-webNo Text
/science/computing/birth-webThe birth of the Web
A-TITLE The birth of the Web
/science/physics/w-boson-sunsh...No Text
/science/physics/w-boson-sunsh...W boson
A-TITLE W boson
/science/physics/z-bosonNo Text
/science/physics/z-bosonZ boson
A-TITLE Z boson
http://www.facebook.com/cernExternal Subdomain v
http://www.instagram.com/cernExternal Subdomain J
http://www.twitter.com/CERNExternal Subdomain W
http://www.linkedin.com/compan...External Subdomain M
http://www.youtube.com/user/ce...External Subdomain 1
https://home.web.cern.ch/contactContact us
/directionsGetting here
http://cern.ch/procurementExternal Doing business with CERN
https://cern.ch/knowledgetransferExternal Knowledge transfer
https://voisins.web.cern.ch/enExternal Subdomain CERN's neighbours
https://cernandsocietyfoundati...External CERN & Society Foundation
/partnershipsPartnerships
https://alumni.cern/External Alumni
https://careers.cern/External Careers
https://visit.cern/External Visits
/data-privacy-protection-policyPrivacy policy
https://home.web.cern.ch/cookiesCookie Management
https://copyright.web.cern.ch/External Subdomain Copyright

Server configuration

HTTP redirects
(Critically important)
This page redirects to "https://home.web.cern.ch/"
HTTP header
(Important)
No X-Powered HTTP header is sent.
This page uses GZip for compressed data transmission.
Performance
(Somewhat important)
This page loads 69 CSS files. This may affect the page load time negatively.
This page loads 57 JavaScript files. This may affect the load time negatively.
The page response time is excellent with 0.08 seconds.
The file size of the HTML document is fine (155 kB).

HTTP Response Header

NameValue
servernginx
content-typetext/html; charset=UTF-8
transfer-encodingchunked
varyAccept-Encoding
cache-controlmax-age=60, public
dateWed, 07 Aug 2024 13:21:27 GMT
x-drupal-dynamic-cacheUNCACHEABLE
content-languageen
x-content-type-optionsnosniff
x-frame-optionsSAMEORIGIN
expiresSun, 19 Nov 1978 05:00:00 GMT
last-modifiedWed, 07 Aug 2024 13:21:27 GMT
etagW/"1723036887"
x-generatorDrupal 10 (https://www.drupal.org)
content-encodinggzip
set-cookie106 Characters
statuscode200
http_versionHTTP/1.1

External factors

This page is referenced by wikipedia.
This website has excellent links from other websites.
This page has backlinks from 6,969 referring domains.
This page has 201,346 backlinks.
This page has backlinks from 3,920 different ip addresses.

Links from Wikipedia

You can find more links using Wikipedia search

Robots.txt

#
# robots.txt
#
# This file is to prevent the crawling and indexing of certain parts
# of your site by web crawlers and spiders run by sites like Yahoo!
# and Google. By telling these "robots" where not to go on your site,
# you save bandwidth and server resources.
#
# This file will be ignored unless it is at the root of your host:
# Used:    http://example.com/robots.txt
# Ignored: http://example.com/site/robots.txt
#
# For more information about the robots.txt standard, see:
# http://www.robotstxt.org/robotstxt.html

User-agent: *
# CSS, JS, Images
Allow: /core/*.css$
Allow: /core/*.css?
Allow: /core/*.js$
Allow: /core/*.js?
Allow: /core/*.gif
Allow: /core/*.jpg
Allow: /core/*.jpeg
Allow: /core/*.png
Allow: /core/*.svg
Allow: /profiles/*.css$
Allow: /profiles/*.css?
Allow: /profiles/*.js$
Allow: /profiles/*.js?
Allow: /profiles/*.gif
Allow: /profiles/*.jpg
Allow: /profiles/*.jpeg
Allow: /profiles/*.png
Allow: /profiles/*.svg
# Directories
Disallow: /core/
Disallow: /profiles/
# Files
Disallow: /README.md
Disallow: /composer/Metapackage/README.txt
Disallow: /composer/Plugin/ProjectMessage/README.md
Disallow: /composer/Plugin/Scaffold/README.md
Disallow: /composer/Plugin/VendorHardening/README.txt
Disallow: /composer/Template/README.txt
Disallow: /modules/README.txt
Disallow: /sites/README.txt
Disallow: /themes/README.txt
Disallow: /web.config
# Paths (clean URLs)
Disallow: /admin/
Disallow: /comment/reply/
Disallow: /filter/tips
Disallow: /node/add/
Disallow: /search/
Disallow: /user/register
Disallow: /user/password
Disallow: /user/login
Disallow: /user/logout
Disallow: /media/oembed
Disallow: /*/media/oembed
# Paths (no clean URLs)
Disallow: /index.php/admin/
Disallow: /index.php/comment/reply/
Disallow: /index.php/filter/tips
Disallow: /index.php/node/add/
Disallow: /index.php/search/
Disallow: /index.php/user/password
Disallow: /index.php/user/register
Disallow: /index.php/user/login
Disallow: /index.php/user/logout
Disallow: /index.php/media/oembed
Disallow: /index.php/*/media/oembed
Crawl-Delay: 20

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home.web.cern.ch
Home | CERN
CERN, the European Organization for Nuclear Research, is one of the world’s largest and most respected centres for scientific research. Its business is fundamental physics, finding out what the Universe is made of and how it works.

Most important keywords

Following keywords were found. You can check the keyword optimization of this page for each keyword.

KeywordResultRecheck
CERN97%Check
CERN society72%Check
CERN openlab69%Check
CERN Community67%Check
science54%Check
fundamental51%Check
world51%Check
universe51%Check
made51%Check
web50%Check
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