Core.ac.uk - SEO Checker

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Overview of the SEO Check
Meta information
100% 
Page quality
79% 
Page structure
58% 
Link structure
90% 
Server
91% 
External factors
100% 
SEO Score
Response time
0.18 s
File size
77.10 kB
Words
705
Media files
42
Number of links
72 internal / 9 external

Task list of SEO Improvements

Meta specifications

Title
(Critically important)
CORE – Aggregating the world’s open access research papers
The length of the page title is perfect. (562 pixels out of 580 max pixel length)
There are no duplicate words in the title
Meta description
(Critically important)
The world’s largest collection of open access research papers
The length of the meta description is perfect. (381 pixels out of 1000 max pixel length)
Crawlability
(Critically important)
There are no problems in accessing the website.
Canonical URL
(Important)
No canonical link is specified.
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)
There are no alternate links specified on this page.
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
viewportwidth=device-width, initial-scale=1, shrink-to-fit=no
descriptionThe world’s largest collection of open access research papers
keywordsresearch, core, thesis, open access
next-head-count11
langen
charsetutf-8

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Page quality

Content
(Critically important)
Some words from the page title are not used within the pages content
This page contains 705 words. That's ok.
29.2% of the text are stop words.
The page contains a listing, which indicates a good text layout.
12 paragraphs were found on this page.
No placeholders texts or images were found.
There are no duplicates on the site.
The average number of words per sentence of 18.93 words is good.
Frames
(Critically important)
This page does not use a frameset.
Mobile optimization
(Somewhat important)
No Apple touch icon is specified.
A viewport "width=device-width, initial-scale=1, shrink-to-fit=no" is provided.
Bold and strong tags
(Somewhat important)
The usage of strong and bold tags is perfect. We recommend the use of up to 14 tags for this page.
Image SEO
(Somewhat important)
1 images have no alt attribute. The content of alt attributes is used by search engines.
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
data:[...] Base64No alt attribute provided
/images/heros/database.svgExplore CORE data
/images/heros/community.svggovernance
/images/heros/homeServices.svgservices
/images/heros/database.svgExplore CORE data
/images/heros/community.svggovernance
/images/heros/homeServices.svgservices
/images/heros/database.svgExplore CORE data
/images/features/globe.svgIndexing the world’s repositories
/images/features/gears.svgComprehensive data coverage
/images/features/building.svgPowerful services
/images/features/neural.svgCutting-edge solutions
...osi-7077ad96cde68258c6d398773c2cd102.svgposi
/images/join/data-provider.svgBecome a data provider
/images/join/membership.svgBecome a member
https://core.ac.uk/images/join/server.svgExplore our services
https://core.ac.uk/images/heros/oai.svglogo
/images/logos/turnitin.pngCompanies
/images/logos/open-university.pngAcademic institutions
/images/logos/mooc-founder.pngResearchers & general public
/images/logos/research-england.pngFunders
/images/services/server-status.svgAccess to raw data
/images/services/search-engine.svgContent discovery
/images/services/time-management.svgManaging content
/images/people/Gareth_Malcolm.jpegGareth Malcolm
https://core.ac.uk/images/logos/nvidia.svglogo
/images/logos/anthropic.svglogo
/images/logos/grammarly.svglogo
https://core.ac.uk/images/logos/lean.svglogo
https://core.ac.uk/images/logos/naver.svglogo
/images/people/kathleen.svgKathleen Shearer
/images/membership/cambridge.svglogo
/images/membership/oxford.svglogo
https://core.ac.uk/images/logos/chica.svglogo
/images/logos/stAndrews.svglogo
/images/logos/imperial.svglogo
/images/people/johnson.jpgBen Johnson
https://core.ac.uk/images/logos/coar.svglogo
https://core.ac.uk/images/logos/sparc.pnglogo
/images/logos/researchInovation.svglogo
/images/logos/losAlamos.svglogo
https://core.ac.uk/images/logos/jisc.svglogo

Page structure

H1 heading
(Critically important)
There is no H1 heading specified.
Headings
(Important)
Some headings occur twice on the page.
The structure of headings is missing one or more levels. Do not skip heading levels.
There are 38 headings on the page. The amount of headings should be in a more proper relation to the amount of text.

Heading structure

Heading levelContent
H2 A comprehensive bibliographic database of the world’s scholarly literature
H2 The world’s largest collection of open access research papers
H2 Machine access to our vast unique full text corpus
H2 A comprehensive bibliographic database of the world’s scholarly literature Duplicate text
H2 The world’s largest collection of open access research papers Duplicate text
H2 Machine access to our vast unique full text corpus Duplicate text
H2 A comprehensive bibliographic database of the world’s scholarly literature Duplicate text
H3 Access to raw data
H3 Content discovery
H3 OAI identifiers
H3 Managing content
H3 Bespoke contracts
H3 Join CORE
H3 Cost-free PIDs for your repository
H3 Who we serve?
H3 Our services
H4 Access to raw data Duplicate text
H4 Content discovery Duplicate text
H4 Managing content Duplicate text
H4 Gareth Malcolm
H4 Kathleen Shearer
H4 Ben Johnson
H5 Companies
H5 Academic institutions
H5 Researchers & general public
H5 Funders
H6 Indexing the world’s repositories
H6 Comprehensive data coverage
H6 Powerful services
H6 Cutting-edge solutions
H6 Gareth Malcolm, Content Partner Manager at Turnitin
H6 Nicola Dowson, Library Services Manager at Open University
H6 Jon Tennant, Rogue Paleontologist and Founder of the Open Science MOOC
H6 Ben Johnson, Research Policy Adviser at Research England
H6 Product
H6 Organisation
H6 Support
H6 Writing about CORE?
Some anchor texts are used more than once.
The number of internal links is ok.
None of the anchor texts is too long.
All internal links are not using dynamic parameters.
There are 9 external links on this page.

Found links on this page

LinkAttributesAnchor text
https://core.ac.uk/Anchor Skip to main content
https://core.ac.uk/CORE 🇺🇦 make metadata, not war
https://core.ac.uk/servicesServices overviewExplore all CORE services
https://core.ac.uk/services/apiAPI
/services/datasetDataset
/services/fastsyncFastSync
/services/recommenderRecommender
/services/discoveryDiscovery
/documentation/oai-resolverOAI Resolver
/services/repository-dashboardDashboard
/services/consultancyConsultancy services
https://core.ac.uk/membershipSupport us
https://core.ac.uk/membershipMembership
https://core.ac.uk/sponsorshipSponsorship
https://core.ac.uk/governanceCommunity governance
/governance/advisoryAdvisory Board
/governance/supportersBoard of supporters
/governance/researchResearch network
https://core.ac.uk/aboutAbout us
https://core.ac.uk/aboutOur mission
https://core.ac.uk/aboutTeam
https://blog.core.ac.uk/External Subdomain Blog
https://core.ac.uk/faqFAQs
https://core.ac.uk/contactContact us
https://core.ac.uk/dataExplore CORE data
https://core.ac.uk/servicesExplore Services
https://core.ac.uk/datasee our data statistic
https://core.ac.uk/dataText duplicate Explore CORE data
https://core.ac.uk/servicesText duplicate Explore Services
https://core.ac.uk/dataText duplicate see our data statistic
https://core.ac.uk/dataText duplicate Explore CORE data
https://core.ac.uk/benefitsIMG-ALT Indexing the world’s repositories
https://core.ac.uk/benefitsNew window repositories and journals
https://core.ac.uk/dataIMG-ALT Comprehensive data coverage
https://core.ac.uk/dataNew window full text
https://core.ac.uk/dataNew window comprehensive collection
https://core.ac.uk/servicesIMG-ALT Powerful services
https://core.ac.uk/servicesNew window services
/governance/supportersIMG-ALT Cutting-edge solutions
/about/research-outputsText duplicate Cutting-edge solutions
/about/research-outputsNew window research
/about/research-outputsNew window AI solutions
https://openscholarlyinfrastru...New window External POSI
https://core.ac.uk/benefitsBecome a data provider
https://core.ac.uk/membershipBecome a member
https://core.ac.uk/servicesExplore our services
https://oai.core.ac.uk/External Subdomain CORE OAI Resolver
/documentation/oai-resolverNew window Learn more.
https://oai.core.ac.uk/External Subdomain Try our OAI resolver
/about/endorsementsFind out more
https://core.ac.uk/servicesAccess to raw data Create new and innovative solutions.
IMG-ALT Access to raw data
https://core.ac.uk/servicesContent discovery Find relevant research and make your research more visible.
IMG-ALT Content discovery
https://core.ac.uk/servicesManaging content Manage how your research content is exposed to the world.
IMG-ALT Managing content
https://core.ac.uk/servicesLearn more
/about/endorsementsNew window Companies
/about/endorsementsShow all
/about/endorsementsNew window Academic
/about/endorsementsText duplicate Show all
/about/endorsementsNew window Partner
/about/endorsementsText duplicate Show all
https://www.open.ac.uk/External Subdomain No Text
/governance/supportersAnchor CORE Members.
https://core.ac.uk/servicesServices
https://core.ac.uk/membershipText duplicate Membership
https://core.ac.uk/sponsorshipText duplicate Sponsorship
https://core.ac.uk/aboutText duplicate About us
https://core.ac.uk/aboutGovernance
https://core.ac.uk/aboutText duplicate Team
https://core.ac.uk/benefitsData providers
https://core.ac.uk/termsTerms
https://core.ac.uk/faqText duplicate FAQs
https://blog.core.ac.uk/External Subdomain Text duplicate Blog
https://core.ac.uk/aboutText duplicate Contact us
/about/research-outputsresearch outputs
https://twitter.com/oacoreNew window External No Text
https://www.linkedin.com/compa...New window External Subdomain No Text
https://github.com/oacoreNew window External No Text
https://core.ac.uk/CORE
https://core.ac.uk/accessibilityAccessibility
https://core.ac.uk/cookiesCookies
https://core.ac.uk/privacyPrivacy

Server configuration

HTTP redirects
(Critically important)
This page redirects to "https://core.ac.uk/"
HTTP header
(Important)
The X-powered header is sent within the response header. (unnecessary)
This page uses GZip for compressed data transmission.
Performance
(Somewhat important)
The page response time is excellent with 0.18 seconds.
The file size of the HTML document is fine (77 kB).

HTTP Response Header

NameValue
dateWed, 09 Oct 2024 04:37:14 GMT
content-typetext/html; charset=utf-8
x-frame-optionsSAMEORIGIN, SAMEORIGIN
access-control-allow-methodsPOST, GET, OPTIONS
access-control-allow-origin*
access-control-allow-headersContent-Type, Access-Control-Allow-Headers, Authorization, X-Frame-Options
x-powered-byNext.js
varyAccept-Encoding,User-Agent
cf-cache-statusDYNAMIC
report-to{"endpoints":[{"url":"https:\/\/a.nel.cloudflare.com\/report\/v4?s=Q3nh0%2B4tb6jto2Ei2Q26qz%2B5bpCgR80ThexbjDxAFfCB4TnYT3Pt2r8plReFxS5QtcHl7GGtTH6kKfHbv3Fv%2Bso%2FXVFhdl4YqbEa%2FvzMpfCje4hpSzwAkz42Rdl%2B"}],"group":"cf-nel","max_age":604800}
nel{"success_fraction":0,"report_to":"cf-nel","max_age":604800}
speculation-rules"/cdn-cgi/speculation"
servercloudflare
cf-ray8cfbac9aea2737e4-FRA
content-encodinggzip
statuscode200
http_versionHTTP/2

External factors

This page is referenced by wikipedia.
This website has excellent links from other websites.
This page has backlinks from 33,371 referring domains.
This page has 1,038,495 backlinks.
This page has backlinks from 21,698 different ip addresses.

Links from Wikipedia

You can find more links using Wikipedia search

Robots.txt

No valid Robots.txt file was found.

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core.ac.uk
CORE – Aggregating the world’s open access research papers
The world’s largest collection of open access research papers

Most important keywords

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

KeywordResultRecheck
CORE70%Check
Research68%Check
open68%Check
world68%Check
Open Access68%Check
Research Papers68%Check
open access research68%Check
open access research papers68%Check
Access66%Check
papers65%Check
Show more keywords and terms

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