Catalog.nlm.nih.gov - SEO Checker

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Overview of the SEO Check
Meta information
0% 
Page quality
49% 
Page structure
58% 
Link structure
0% 
Server
74% 
External factors
100% 
SEO Score
Response time
1.29 s
File size
4.70 kB
Words
0
Media files
0
Number of links
0 internal / 0 external

Task list of SEO Improvements

Meta specifications

Title
(Critically important)
The title of the page is empty or not set.
Meta description
(Critically important)
The meta description is empty.
Crawlability
(Critically important)
This site is blocked from indexing.
Canonical URL
(Important)
The canonical link is empty.
Language
(Somewhat important)
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)
There should not be dynamic parameters 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.
The character encoding is not specified in the HTTP header.
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
viewportinitial-scale=1,width=device-width,shrink-to-fit=no
descriptionEmpty
keywordsEmpty
robotsnoindex
langen
og:titleEmpty
og:descriptionEmpty
og:imageEmpty
og:typewebsite
og:urlEmpty
X-UA-CompatibleIE=edge
charsetutf-8

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Page quality

Content
(Critically important)
There are only 0 words on this page. Use at least 250 words to provide useful information.
No paragraphs were detected.
No placeholders texts or images were found.
Frames
(Critically important)
This page does not use a frameset.
Mobile optimization
(Somewhat important)
This page loads 8 JavaScript files. This may affect the load time negatively.
A viewport "initial-scale=1,width=device-width,shrink-to-fit=no" is provided.
At least one Apple touch icon is specified.
Bold and strong tags
(Somewhat important)
The usage of strong and bold tags is perfect. We recommend the use of up to 6 tags for this page.
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

No media files were found.

Page structure

H1 heading
(Critically important)
There is no H1 heading specified.
Headings
(Important)
There are no headings specified on the page. Headings are important for search engine optimization and help to structure your content.

Heading structure

No headings were found.
Baselink: /discovery/
This page is a dead end, because there are no internal links.
There are no external links on this page.

Found links on this page

No internal links were found.

Server configuration

HTTP redirects
(Critically important)
This page redirects to "https://catalog.nlm.nih.gov/discovery/search?vid=01NLM_INST%3A01NLM_INST"
HTTP header
(Important)
No X-Powered HTTP header is sent.
This page uses GZip for compressed data transmission.
Performance
(Somewhat important)
The page response time is slow (1.29 seconds). The response time should be less than 0.4 seconds. Slow websites are bad for search engine bots and also result in bad user experience.
This page loads 8 JavaScript files. This may affect the load time negatively.
This page only loads 3 CSS files. That's ok.
The file size of the HTML document is fine (5 kB).

HTTP Response Header

NameValue
x-request-idF2BDLnCcE3
p3pCP="IDC DSP COR ADM DEVi TAIi PSA PSD IVAi IVDi CONi HIS OUR IND CNT"
set-cookie140 Characters
accept-rangesbytes
etagW/"4812-1730926706000"
last-modifiedWed, 06 Nov 2024 20:58:26 GMT
cache-controlmax-age=0
expiresThu, 14 Nov 2024 13:41:26 GMT
content-security-policyobject-src blob: 'self' *.exlibrisgroup.com *.exlibrisgroup.com.cn www.google-analytics.com stats.g.doubleclick.net s3.amazonaws.com www.youtube.com youtube.com artic.contentdm.oclc.org iiif.nlm.nih.gov catalog.nlm.nih.gov ;worker-src blob: 'self' *.exlibrisgroup.com *.exlibrisgroup.com.cn www.google-analytics.com stats.g.doubleclick.net s3.amazonaws.com www.youtube.com youtube.com artic.contentdm.oclc.org catalog.nlm.nih.gov ;upgrade-insecure-requests; report-uri /infra/CSPReportEndpoint.jsp; report-to csp-report-endpoint;
report-to{"max_age":10886400,"endpoints":[{"url":"https://na91.alma.exlibrisgroup.com/infra/CSPReportEndpoint.jsp"}],"group":"csp-report-endpoint"}
x-content-type-optionsnosniff
varyaccept-encoding
content-encodinggzip
content-typetext/html
transfer-encodingchunked
dateThu, 14 Nov 2024 13:41:26 GMT
strict-transport-securitymax-age=31536000; includeSubDomains; preload
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 41 referring domains.
This page has 2,293 backlinks.
This page has backlinks from 40 different ip addresses.

Links from Wikipedia

You can find more links using Wikipedia search

Robots.txt

sitemap: https://catalog.nlm.nih.gov/view/scholar/siteindex.xml

User-agent: *
Allow: /

Search preview

catalog.nlm.nih.gov › discovery › search
No title provided
No keywords were found.

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