Esrl.noaa.gov - SEO Checker

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Overview of the SEO Check
Meta information
79% 
Page quality
46% 
Page structure
20% 
Link structure
93% 
Server
70% 
External factors
98% 
SEO Score
Response time
1.25 s
File size
12.90 kB
Words
181
Media files
6
Number of links
6 internal / 25 external

Task list of SEO Improvements

Meta specifications

Title
(Critically important)
NOAA Earth System Research Laboratories
The length of the page title is perfect. (391 pixels out of 580 max pixel length)
There are no duplicate words in the title
Meta description
(Critically important)
The NOAA Earth System Research Laboratories (ESRL) pursue a broad and comprehensive understanding of the many physical, chemical, and biological processes that comprise the Earth system to better predict their behavior from minutes to millennia on local to global scales.
The meta description is too long: 1716 pixels from max. 1000 pixels. Optimize description
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)
This page is hosted on a subdomain. Use a top level domain for better SEO results.
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)
The favicon is linked correctly.

Meta tags

NameValue
viewportwidth=device-width, initial-scale=1
authorEmpty
keywordsEarth System Research Laboratories, ESRL, NOAA/ESRL, National Oceanic and Atmospheric Administration, NOAA
descriptionThe NOAA Earth System Research Laboratories (ESRL) pursue a broad and comprehensive understanding of the many physical, chemical, and biological processes that comprise the Earth system to better predict their behavior from minutes to millennia on local to global scales.
DC.descriptionThe NOAA Earth System Research Laboratories (ESRL) pursue a broad and comprehensive understanding of the many physical, chemical, and biological processes that comprise the Earth system to better predict their behavior from minutes to millennia on local to global scales.
DC.titleNOAA Earth System Research Laboratories
langen
X-UA-CompatibleIE=edge
charsetutf-8

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Page quality

Content
(Critically important)
There are only 181 words on this page. Use at least 250 words to provide useful information.
The average number of words per sentence of 25.33 words is high.
23.2% of the text are stop words.
Keywords used in the page title are also used in the page content. That's good!
The page contains a listing, which indicates a good text layout.
3 paragraphs were found on this page.
No placeholders texts or images were found.
There are no duplicates on the site.
Frames
(Critically important)
This page does not use a frameset.
Mobile optimization
(Somewhat important)
No Apple touch icon is specified.
This page loads 7 JavaScript files. This may affect the load time negatively.
A viewport "width=device-width, initial-scale=1" 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
https://esrl.noaa.gov/img/noaa-logo.pngNOAA LogoLink to noaa.gov
https://esrl.noaa.gov/img/noaa_notext.svgNOAA LogoLink to noaa.gov
/img/csl-noaa-p3-by-cires.pngNOAA P-3 aircraft. Credit: CIRESNOAA P-3 aircraft. Credit: CIRES
...l-south-pole-by-patrick-cullis-cires.pngA plastic balloon being launched at the South Pole, with Auroras in the background. Credit: Patrick Cullis, CIRES/NOAAA plastic balloon being launched at the South Pole, with Auroras in the background. Credit: Patrick Cullis, CIRES/NOAA
/img/gsl-clouds-by-noaa-psl.pngCloud photo credit: NOAA/PSLCloud photo credit: NOAA/PSL
/img/psl-lake-powell-by-bradley-udall.pngLake Powell and Glen Canyon Dam in July 2004. Credit: Bradley Udall, Univ. of ColoradoLake Powell and Glen Canyon Dam in July 2004. Credit: Bradley Udall, Univ. of Colorado

Page structure

H1 heading
(Critically important)
Welcome to ESRL
The H1 heading contains the words Welcome to! Use important keywords instead.
Too many H1 headings
The H1 heading is too short (15 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 Welcome to ESRL
H1 Explore Our Laboratories
H3 Chemical Sciences Laboratory
H3 Global Monitoring Laboratory
H3 Global Systems Laboratory
H3 Physical Sciences Laboratory
H4 Our Organization
H4 Contact Us
H4 Mailing Address
There are too few (6) internal links on this page.
Every linktext is unique.
None of the anchor texts is too long.
All internal links are not using dynamic parameters.
There are 25 external links on this page.

Found links on this page

LinkAttributesAnchor text
https://esrl.noaa.gov/IMG-ALT NOAA Logo
https://esrl.noaa.gov/Earth System Research Laboratories
https://esrl.noaa.gov/NOAA ESRL
IMG-ALT NOAA Logo
https://esrl.noaa.gov/about/Overview
https://boulder.noaa.gov/External Subdomain Outreach
https://csl.noaa.gov/research/External Subdomain Chemical Sciences Laboratory
https://gml.noaa.gov/about/res...External Subdomain Global Monitoring Laboratory
https://gsl.noaa.gov/External Subdomain Global Systems Laboratory
https://psl.noaa.gov/research/External Subdomain Physical Sciences Laboratory
https://esrl.noaa.gov/contact/People
https://esrl.noaa.gov/aboutLearn more
https://csl.noaa.gov/External Subdomain IMG-ALT NOAA P-3 aircraft. Credit: CIRES
https://csl.noaa.gov/External Subdomain CSL
https://csl.noaa.gov/External Subdomain Text duplicate Chemical Sciences Laboratory
https://gml.noaa.gov/External Subdomain IMG-ALT A plastic balloon being launched at the South Pole, with Auroras in the background. Credit: Patrick Cullis, CIRES/NOAA
https://gml.noaa.gov/External Subdomain GML
https://gml.noaa.gov/External Subdomain Text duplicate Global Monitoring Laboratory
https://gsl.noaa.gov/External Subdomain IMG-ALT Cloud photo credit: NOAA/PSL
https://gsl.noaa.gov/External Subdomain GSL
https://gsl.noaa.gov/External Subdomain Text duplicate Global Systems Laboratory
https://psl.noaa.gov/External Subdomain IMG-ALT Lake Powell and Glen Canyon Dam in July 2004. Credit: Bradley Udall, Univ. of Colorado
https://psl.noaa.gov/External Subdomain PSL
https://psl.noaa.gov/External Subdomain Text duplicate Physical Sciences Laboratory
https://www.commerce.gov/External Subdomain U.S. Department of Commerce
https://www.noaa.gov/External Subdomain National Oceanic and Atmospheric Administration
https://research.noaa.gov/External Subdomain Office of Oceanic and Atmospheric Research
https://nsd.rdc.noaa.gov/External Subdomain NOAA National Staff
https://www.noaa.gov/protectin...External Subdomain Privacy Policy
https://www.cio.noaa.gov/servi...External Subdomain Information Quality
https://www.noaa.gov/disclaimerExternal Subdomain Disclaimer
https://www.usa.gov/External Subdomain USA.gov

Server configuration

HTTP redirects
(Critically important)
This page redirects to "https://esrl.noaa.gov/"
HTTP header
(Important)
No X-Powered HTTP header is sent.
The web server transmits the web page (HTML) in compressed form.
Performance
(Somewhat important)
The page response time is slow (1.25 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 6 CSS files. This may affect the page load time negatively.
This page loads 7 JavaScript files. This may affect the load time negatively.
The file size of the HTML document is fine (13 kB).

HTTP Response Header

NameValue
servernginx
dateTue, 02 Jun 2026 16:59:51 GMT
content-typetext/html
last-modifiedFri, 09 May 2025 20:25:46 GMT
transfer-encodingchunked
connectionkeep-alive
varyAccept-Encoding
etagW/"681e64ca-16a3"
strict-transport-securitymax-age=31536000; includeSubDomains
x-frame-optionsSAMEORIGIN
x-content-type-optionsnosniff
x-xss-protection1; mode=block
content-encodinggzip
statuscode200
http_versionHTTP/1.1

External factors

This page is referenced by wikipedia.
This page is very well linked from other websites.
This page has backlinks from 16 referring domains.
This page has 44 backlinks.
This page has backlinks from 15 different ip addresses.

Links from Wikipedia

You can find more links using Wikipedia search

Robots.txt

User-agent: *

Similar sites

Search preview

esrl.noaa.gov
NOAA Earth System Research Laboratories
The NOAA Earth System Research Laboratories (ESRL) pursue a broad and comprehensive understanding of the many physical, chemical, and biological processes that comprise the Earth system to better predict their behavior from minutes to millennia on local to global scales.

Most important keywords

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

KeywordResultRecheck
NOAA80%Check
NOAA ESRL79%Check
ESRL78%Check
NOAA Earth System68%Check
Laboratories66%Check
NOAA Earth System Research66%Check
Research Laboratories64%Check
System Research Laboratories64%Check
Earth System Research Laboratories63%Check
Research62%Check
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