Classification.nlm.nih.gov - SEO Checker

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Overview of the SEO Check
Meta information
65% 
Page quality
48% 
Page structure
79% 
Link structure
100% 
Server
81% 
External factors
100% 
SEO Score
Response time
0.61 s
File size
16.20 kB
Words
138
Media files
5
Number of links
15 internal / 20 external

Task list of SEO Improvements

Meta specifications

Title
(Critically important)
Classification-Home
The page title is too short. (181 pixels of 580 max pixel length) Optimize title
The page title is only one word.
There are no duplicate words in the title
Meta description
(Critically important)
The meta description is missing.
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 name is very long.
The domain is no subdomain.
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)
No favicon is linked in the HTML code.

Meta tags

NameValue
viewportwidth=device-width, initial-scale=1, shrink-to-fit=no
NLM.Contact.Email[email protected]
langen
X-UA-CompatibleIE=edge,chrome=1
Content-Typetext/html; charset=UTF-8
charsetUTF-8

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Page quality

Content
(Critically important)
There are only 138 words on this page. Use at least 250 words to provide useful information.
Only 1 paragraph/s was/were found on this page.
18.1% of the text are stop words.
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 24 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 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

URLAlt attributeTitle
/static/classification/images/NLM_White.pngNLM logo
...ic/classification/images/nlm_library.pngClassification
/static/classification/images/Twitter_W.svgTwitter
...tic/classification/images/Facebook_W.svgFacebook
/static/classification/images/YouTube_W.svgYou Tube

Page structure

H1 heading
(Critically important)
There is no H1 heading specified.
Headings
(Important)
The structure of headings is missing one or more levels. Do not skip heading levels.

Heading structure

Heading levelContent
H2 NLM Classification Materials
H2 Other NLM Resources
H3 Classification 2024 Winter Edition
The number of internal links is ok.
Every linktext is unique.
None of the anchor texts is too long.
All internal links are not using dynamic parameters.
There are 20 external links on this page.

Found links on this page

LinkAttributesAnchor text
https://www.nlm.nih.gov/External Subdomain IMG-ALT NLM logo
/Home
/schedules/searchSearch Schedules
/schedulesAll Schedules
/class_index/index/otherSearch Index
/helpHelp
/static/classification/pdf/nlm...NLM Policy on Classification
/scopeScope of Revision of the 2024 Winter Edition
/current_edition_class_numbersClass Numbers Added and Canceled (Current Edition)
/cumulative_class_numbers_addedClass Numbers Added (Cumulative List)
/cumulative_class_numbers_canc...Canceled Class Numbers (Cumulative List)
/posterNLM Classification Poster
/outlineOutline of the NLM Classification
/tablegTable G (geographic notation)
/tableg_practicesTable G Practices
/19century_schedule19th Century Schedule
https://www.nlm.nih.gov/tsd/ca...External Subdomain Fundamentals of the NLM Classification [online training]
https://www.nlm.nih.gov/tsd/ca...New window External Subdomain NLM Cataloging Section homepage
https://www.ncbi.nlm.nih.gov/n...New window External Subdomain NLM Catalog or LocatorPlus
https://meshb.nlm.nih.gov/searchNew window External Subdomain MeSH Browser
https://www.nlm.nih.gov/social...External Subdomain Connect with NLM
https://twitter.com/NLM_NIHExternal IMG-ALT Twitter
https://www.facebook.com/natio...External Subdomain IMG-ALT Facebook
https://www.youtube.com/user/N...External Subdomain IMG-ALT You Tube
https://www.google.com/maps/pl...External Subdomain 8600 Rockville Pike Bethesda, MD 20894
https://www.nlm.nih.gov/web_po...External Subdomain Web Policies
https://www.nih.gov/institutes...External Subdomain FOIA
https://www.hhs.gov/vulnerabil...External Subdomain HHS Vulnerability Disclosure
https://support.nlm.nih.gov/?fromExternal Subdomain NLM Support Center
https://www.nlm.nih.gov/access...External Subdomain Accessibility
https://www.nlm.nih.gov/career...External Subdomain Careers
https://www.nlm.nih.gov/External Subdomain NLM
https://www.nih.gov/External Subdomain NIH
https://www.hhs.gov/External Subdomain HHS
https://www.usa.gov/External Subdomain USA.gov

Server configuration

HTTP redirects
(Critically important)
This page redirects to "https://classification.nlm.nih.gov/"
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 of 0.61 seconds is longer than the recommended limit of 0.4 seconds. A high response time unnecessarily slows down search engine crawling and results in bad user experience as well.
The file size of the HTML document is fine (16 kB).

HTTP Response Header

NameValue
dateSun, 11 Aug 2024 02:36:30 GMT
content-typetext/html; charset=utf-8
set-cookie178 Characters
status200 OK
referrer-policysame-origin
x-frame-optionsDENY
x-content-type-optionsnosniff
cross-origin-opener-policysame-origin
x-powered-byPhusion Passenger(R)
servernginx + Phusion Passenger(R)
strict-transport-securitymax-age=31536000; includeSubDomains; preload
content-security-policy-report-onlydefault-src 'none'; script-src 'self' https://code.jquery.com https://cdnjs.cloudflare.com https://maxcdn.bootstrapcdn.com https://cdn.datatables.net https://www.googletagmanager.com https://script.crazyegg.com https://dap.digitalgov.gov https://www.google-analytics.com https://stackpath.bootstrapcdn.com; connect-src 'self' https://www.google-analytics.com https://www.googletagmanager.com https://script.crazyegg.com https://stats.g.doubleclick.net https://pagestates-tracking.crazyegg.com https://assets-tracking.crazyegg.com https://tracking.crazyegg.com https://region1.google-analytics.com; img-src 'self' https://www.google-analytics.com https://www.gstatic.com https://cdn.datatables.net https://co1.qualtrics.com https://code.jquery.com data: ; child-src blob: ; style-src 'self' 'unsafe-inline' https://code.jquery.com https://fonts.googleapis.com https://maxcdn.bootstrapcdn.com https://use.fontawesome.com; font-src 'self' data: https://fonts.gstatic.com https://use.fontawesome.com; media-src 'self'; worker-src blob: ; upgrade-insecure-requests; report-uri https://nlmoccs.report-uri.com/r/d/csp/reportOnly;
content-encodinggzip
statuscode200
http_versionHTTP/2

External factors

Blacklists
(Nice to have)
This website is not classified "for adult only".
This website has excellent links from other websites.
This page has backlinks from 61 referring domains.
This page has 163 backlinks.
This page has backlinks from 61 different ip addresses.
Facebook popularity
(Somewhat important)
The page has 0 shares and comments on Facebook.

Links from Wikipedia

No links from Wikipedia were found.

Robots.txt

No valid Robots.txt file was found.

Similar sites

Search preview

classification.nlm.nih.gov
Classification-Home

Most important keywords

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

KeywordResultRecheck
Classification70%Check
NLM Classification64%Check
NLM58%Check
Class Numbers53%Check
Class Numbers Added47%Check
NIH46%Check
gov46%Check
Edition38%Check
Winter38%Check
resources38%Check
Show more keywords and terms

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