Nlm.nih.gov - SEO Checker

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Overview of the SEO Check
Meta information
80% 
Page quality
55% 
Page structure
49% 
Link structure
86% 
Server
90% 
External factors
100% 
SEO Score
Response time
0.06 s
File size
27.80 kB
Words
398
Media files
22
Number of links
38 internal / 34 external

Task list of SEO Improvements

Meta specifications

Title
(Critically important)
National Library of Medicine - National Institutes of Health
The length of the page title is perfect. (517 pixels out of 580 max pixel length)
There are no duplicate words in the title
Meta description
(Critically important)
Welcome to the National Library of Medicine, the world’s largest biomedical library and the center of biomedical informatics and computational biology at NIH.
There are more than one meta descriptions on the page. Only one is allowed.
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 character encoding is not specified in the HTTP header.
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)
No favicon is linked in the HTML code.

Meta tags

NameValue
titleNational Library of Medicine - National Institutes of Health
typewebsite
descriptionThe National Library of Medicine (NLM), on the NIH campus in Bethesda, Maryland, is the world's largest biomedical library and the developer of electronic information services that delivers data to millions of scientists, health professionals and members of the public around the globe, every day.
imagehttps://www.nlm.nih.gov/images/NLMgeneric.jpg
image:altNational Library of Medicine (NLM)
viewportwidth=device-width, initial-scale=1, shrink-to-fit=no
DC.TitleNational Library of Medicine - National Institutes of Health
DC.PublisherU.S. National Library of Medicine
DC.Date.Issued1993-10-10
DC.Date.Modified2022-12-20
NLMDC.Date.LastReviewed2023-03-07
NLM.Contact.Email[email protected]
DC.TypeOther
NLM.Permanence.LevelPermanent: Dynamic Content
DC.RightsPublic Domain
DC.Languageeng
keywordsNational Library of Medicine, MEDLINE, LocatorPlus, MedlinePlus, NLM, Index Medicus, UMLS, Unified Medical Language System, Mesh, Medical Subject Headings, Visible Human, PubMed, PubMed Central, ClinicalTrials, TOXNET, Digital Collections, DailyMed, AccessGUDID, Genetics Home Reference
langen
twitter:cardsummary_large_image
twitter:site@NLM_NIH
twitter:titleNational Library of Medicine - National Institutes of Health
twitter:descriptionWelcome to the National Library of Medicine, the world’s largest biomedical library and the center of biomedical informatics and computational biology at NIH.
twitter:imagehttps://www.nlm.nih.gov/images/NLMgeneric.jpg
twitter:image:altNational Library of Medicine (NLM)
og:titleNational Library of Medicine - National Institutes of Health
og:typewebsite
og:descriptionWelcome to the National Library of Medicine, the world’s largest biomedical library and the center of biomedical informatics and computational biology at NIH.
og:imagehttps://www.nlm.nih.gov/images/NLMgeneric.jpg
og:image:altNational Library of Medicine (NLM)
X-UA-CompatibleIE=edge,chrome=1
Content-Typetext/html; charset=utf-8

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Page quality

Content
(Critically important)
Some words from the page title are not used within the pages content
There are only 398 words on this page. Good pages should have about 800 words of useful content.
26.9% 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.
7 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 24.86 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 6 JavaScript files. This may affect the load time negatively.
A viewport "width=device-width, initial-scale=1, shrink-to-fit=no" is provided.
Bold and strong tags
(Somewhat important)
Some tags are too long. With 92 characters this one is longer than 70 characters:
"read research highlights | meet our principal investigators | explore training opportunities"
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
/images/NLM_White.pngNLM logo
/images/icon_pubmed.svgPubMed
/images/icon_medline.svgMedLine Plus
/images/icon_openi.svgOpen-i
/images/icon_mesh.svgMESH
/images/icons_clinical.svgClinical Trials
/images/icon_blast.svgBLAST
/news/images/musings.jpgDirector's blog
/images/circulating.pngCirculating Now
/news/images/insights.pngNCBI Insights
https://www.nlm.nih.gov/images/announce.jpgAnnouncements
https://www.nlm.nih.gov/news/images/tb.jpgTechnical Bulletin
/about/image/IRP_home.jpgIRP home no text.
https://www.nlm.nih.gov/images/IT.jpgDoctors with tablet
https://www.nlm.nih.gov/images/it3.jpgDoctor with tablet
/images/training3.jpgWoman at the conference
https://www.nlm.nih.gov/images/history3.jpgOld photo of NLM
https://www.nlm.nih.gov/images/history.jpgCurrent photo of NLM
/images/StrategicPlan.jpgStrategic Plan cover
/images/Twitter_W.svgTwitter
/images/Facebook_W.svgFacebook
/images/YouTube_W.svgYou Tube

Page structure

H1 heading
(Critically important)
News and Highlights
Too many H1 headings
The H1 heading is too short (19 characters). It should be at least 20 Characters long.
Headings
(Important)
The structure of headings is missing one or more levels. Do not skip heading levels.

Heading structure

Heading levelContent
H1 News and Highlights
H1 Research at NLM
H1 Historical Collections at NLM
H1 Biomedical and Clinical Informatics at NLM
H1 About NLM
H4 NLM Intramural Research Program
H4 Health IT and Health Data Standards
H4 Unified Medical Language System (UMLS) Terminology Services
H4 Biomedical Informatics Training Program
H4 History
H4 Organization
H4 Strategic Plan
H5 PubMed
H5 MedlinePlus
H5 Open-i
H5 MeSH
H5 ClinicalTrials.gov
H5 BLAST
H5 Director's Blog
H5 Circulating Now
H5 NCBI Insights
H5 NLM Announcements
H5 Technical Bulletin
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 too many external links (34) on this page.

Found links on this page

LinkAttributesAnchor text
https://www.nlm.nih.gov/Anchor Skip Navigation Bar
A-TITLE Skip the navigation on this page
https://www.nlm.nih.gov/IMG-ALT NLM logo
https://eresources.nlm.nih.gov...External All Products and Services
https://clinicaltrials.gov/External ClinicalTrials.gov
https://collections.nlm.nih.gov/External Digital Collections
https://catalog.nlm.nih.gov/External LocatorPlus Catalog
https://meshb.nlm.nih.gov/searchExternal Medical Subject Headings (MeSH)
https://medlineplus.gov/External MedlinePlus
https://pubmed.ncbi.nlm.nih.gov/External Subdomain PubMed/MEDLINE
https://uts.nlm.nih.gov/uts/External Unified Medical Language System (UMLS)
/portals/researchers.htmlFor Researchers
/portals/publishers.htmlFor Publishers
/portals/librarians.htmlFor Librarians
/training.htmlFor Educators/Trainers
/portals/healthcare.htmlFor Health care Professionals
/portals/public.htmlFor the Public
/about/index.htmlAbout the Library
/about/visitor.htmlVisit the Library
/hmd/index.htmlHistory of Medicine
/about/org.htmlNLM by Organization
/news/newsandevents.htmlNews, Events, and Updates
/ep/index.htmlNLM Extramural Programs
/research/index.htmlNLM Intramural Research Program
https://www.ncbi.nlm.nih.gov/External National Center for Biotechnology Information
https://lhncbc.nlm.nih.gov/External Lister Hill National Center for Biomedical Communications
https://www.ncbi.nlm.nih.gov/p...External PubMed Citations for biomedical literature
IMG-ALT PubMed
https://medlineplus.gov/External MedlinePlus Reliable, up-to-date health information for you
IMG-ALT MedLine Plus
https://openi.nlm.nih.gov/External Open-i An experimental multimedia search engine
IMG-ALT Open-i
https://www.ncbi.nlm.nih.gov/meshExternal MeSH Medical Subject Headings
IMG-ALT MESH
https://clinicaltrials.gov/External ClinicalTrials.gov A database of clinical studies, worldwide
IMG-ALT Clinical Trials
https://blast.ncbi.nlm.nih.gov...External Subdomain BLAST Basic Local Alignment Search Tool
IMG-ALT BLAST
https://nlmdirector.nlm.nih.gov/External IMG-ALT Director's blog
https://nlmdirector.nlm.nih.gov/External Director's Blog
https://circulatingnow.nlm.nih...External IMG-ALT Circulating Now
https://circulatingnow.nlm.nih...External Text duplicate Circulating Now
https://ncbiinsights.ncbi.nlm....External Subdomain IMG-ALT NCBI Insights
https://ncbiinsights.ncbi.nlm....External Subdomain Text duplicate NCBI Insights
/news/newsevents.htmlIMG-ALT Announcements
/news/newsevents.htmlNLM Announcements
/pubs/techbull/tb.htmlIMG-ALT Technical Bulletin
/pubs/techbull/tb.htmlText duplicate Technical Bulletin
/research/index.htmlText duplicate NLM Intramural Research Program
/research/highlights.htmlREAD RESEARCH HIGHLIGHTS
/research/researchstaff/staff-...MEET OUR PRINCIPAL INVESTIGATORS
/research/training.htmlEXPLORE TRAINING OPPORTUNITIES
/healthit/index.htmlHealth IT and Health Data Standards
/healthit/index.htmlLearn about NLM’s contributions to Health IT
https://uts.nlm.nih.gov/uts/External Unified Medical Language System (UMLS) Terminology Services
https://uts.nlm.nih.gov/uts/External Explore UMLS
/research/training.htmlBiomedical Informatics Training Program
/research/training.htmlInvestigate training opportunities
/about/briefhistory.htmlHistory
/about/briefhistory.htmlExplore our past
/about/org.htmlOrganization
/about/org.htmlExplore the Library
/pubs/plan/lrp17/NLM_Strategic...Strategic Plan
/pubs/plan/lrp17/NLM_Strategic...VIEW OUR STRATEGIC PLAN
/socialmedia/index.htmlConnect with NLM
https://twitter.com/NLM_NIHExternal IMG-ALT Twitter
A-TITLE External link: please review our privacy policy.
https://www.facebook.com/natio...External IMG-ALT Facebook
A-TITLE External link: please review our privacy policy.
https://www.youtube.com/user/N...External IMG-ALT You Tube
A-TITLE External link: please review our privacy policy.
https://www.google.com/maps/pl...External 8600 Rockville Pike Bethesda, MD 20894
/web_policies.htmlWeb Policies
https://www.nih.gov/institutes...External FOIA
https://www.hhs.gov/vulnerabil...External HHS Vulnerability Disclosure
https://support.nlm.nih.gov/?fromExternal NLM Support Center
/accessibility.htmlAccessibility
/careers/careers.htmlCareers
https://www.nlm.nih.gov/NLM
https://www.nih.gov/External NIH
https://www.hhs.gov/External HHS
https://www.usa.gov/External USA.gov

Server configuration

HTTP redirects
(Critically important)
This page redirects to "https://www.nlm.nih.gov/"
HTTP header
(Important)
No X-Powered HTTP header is sent.
This page uses GZip for compressed data transmission.
Performance
(Somewhat important)
This page loads 4 CSS files. This may affect the page load time negatively.
This page loads 6 JavaScript files. This may affect the load time negatively.
The page response time is excellent with 0.06 seconds.
The file size of the HTML document is fine (28 kB).

HTTP Response Header

NameValue
content-typetext/html
transfer-encodingchunked
connectionkeep-alive
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x-amz-request-idGBT9PZ1MXPFPCFPB
x-amz-replication-statusCOMPLETED
last-modifiedTue, 21 Mar 2023 11:36:40 GMT
x-amz-server-side-encryptionAES256
x-amz-version-idbrzGjwKF8HYkRaVT8gr7GCgBuVmhOOyv
serverAmazonS3
x-frame-optionsSAMEORIGIN
strict-transport-securitymax-age=31536000; includeSubDomains; preload
content-security-policy-report-onlydefault-src 'none'; font-src fonts.gstatic.com maxcdn.bootstrapcdn.com use.fontawesome.com data: *.nlm.nih.gov; connect-src google-analytics.com siteintercept.qualtrics.com stats.g.doubleclick.net *.nlm.nih.gov; frame-src platform.twitter.com www.google.com; img-src 'self' data: www.google-analytics.com www.googletagmanager.com gtrk.s3.amazonaws.com stats.g.doubleclick.net co1.qualtrics.com; media-src 'self'; object-src 'self'; script-src 'self' 'unsafe-inline' *.nlm.nih.gov ajax.googleapis.com siteintercept.qualtrics.com www.google-analytics.com dap.digitalgov.gov www.googletagmanager.com code.jquery.com *.cloudfront.net; style-src 'self' 'unsafe-inline' fonts.googleapis.com use.fontawesome.com maxcdn.bootstrapcdn.com *.nlm.nih.gov code.jquery.com cdn.datatables.net; upgrade-insecure-requests; report-uri https://nlmoccs.report-uri.com/r/d/csp/reportOnly
content-encodinggzip
dateSun, 02 Apr 2023 02:56:02 GMT
etagW/"8f960cb9fe944a6af84ccacca16da393"
varyAccept-Encoding
x-cacheHit from cloudfront
via1.1 002af2e4f72157b8b4bd2de012b5b57c.cloudfront.net (CloudFront)
x-amz-cf-popFRA56-P6
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age2
statuscode200
http_versionHTTP/1.1

External factors

Blacklists
(Nice to have)
This website is not classified "for adult only".
This page is referenced by wikipedia.
This website has excellent links from other websites.
This page has backlinks from 706 referring domains.
This page has 138,904 backlinks.
This page has backlinks from 496 different ip addresses.
Facebook popularity
(Somewhat important)
The page has 0 shares and comments on Facebook.
Listed on Webwiki
(Nice to have)
This website is listed on Webwiki.

Links from Wikipedia

You can find more links using Wikipedia search

Robots.txt

User-agent: *
Disallow: /accenture/
Disallow: /cgi/
Disallow: /sitemessages/
Disallow: /admin/
Disallow: /homedev/
Disallow: /test/
Disallow: /web/documentation/accessibility-checklists/
# Archived pages
Disallow: /archive/
# MEDLINEplus specfic
Disallow: /medlineplus2/
Disallow: /medlineplus/medplapp/
Disallow: /medlineplus/URLchecker/
Disallow: /medlineplus/usp/
Disallow: /medlineplus/logs/
Disallow: /medlineplus/stats/
Disallow: /medlineplus/glftp/
Disallow: /medlineplus/procedures/
Disallow: /medlineplus/mobilefeeds/
Disallow: /medlineplus/spanish/mobilefeeds/
Disallow: /medlineplus/feeds/topics/
Disallow: /medlineplus/groupfeeds/
Disallow: /medlineplus/spanish/feeds/topics/
Disallow: /medlineplus/spanish/groupfeeds/
Disallow: /medlineplus/golocal/
Disallow: /medlineplus/golocaldocs/
Disallow: /medlineplus/xml/
Disallow: /medlineplus/xml/vocabulary/
Disallow: /medlineplus/scwidget/topsearch.html
Disallow: /medlineplus/spanish/scwidget/topsearch.html

# Framed versions of vhp presentations.  Non-framed versions are allowed - TSL 05JAN1999
Disallow: /research/visible/vhpconf98/AUTHORS/WERNER2/
Disallow: /research/visible/vhpconf98/AUTHORS/SACHSE2/

# GoLocal extranet
Disallow: /golocal/extranet/

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www.nlm.nih.gov
National Library of Medicine - National Institutes of Health
Welcome to the National Library of Medicine, the world’s largest biomedical library and the center of biomedical informatics and computational biology at NIH.

Most important keywords

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

KeywordResultRecheck
NLM63%Check
Library62%Check
National Library60%Check
NIH59%Check
National58%Check
Medicine58%Check
Highlights55%Check
Biomedical and Clinical55%Check
Health54%Check
Biomedical54%Check
Show more keywords and terms

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