Swift.gsfc.nasa.gov - SEO Checker

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Overview of the SEO Check
Meta information
85% 
Page quality
72% 
Page structure
70% 
Link structure
98% 
Server
34% 
External factors
100% 
SEO Score
Response time
0.63 s
File size
14.70 kB
Words
797
Media files
6
Number of links
25 internal / 26 external

Task list of SEO Improvements

Meta specifications

Title
(Critically important)
The Neil Gehrels Swift Observatory
The length of the page title is perfect. (318 pixels out of 580 max pixel length)
There are no duplicate words in the title
Meta description
(Critically important)
The Neil Gehrels Swift Observatory
The length of the meta description is perfect. (318 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)
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)
HTTP-Header Content-Type: iso-8859-1
Meta Charset Attribut: utf-8
The specified character encodings are different.
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
descriptionThe Neil Gehrels Swift Observatory
keywordsswift, grb, swift homepage, swift website, swift web site, science support center, ssc, swift ssc, gssc, gamma-ray, gamma, space, telescope, nasa, NASA, bursts, bat, xrt, uvot
robotsnoodp
orgcode661
rnoPhillip.A.Newman.1
content-ownerJohn.D.Myers.1
webmasterStephan.F.Fantasia.1
langen
charsetutf-8

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Page quality

Content
(Critically important)
Words from the H1 heading are not used in the page content.
This page contains 797 words. That's ok.
32.5% 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.
8 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 19.97 words is good.
Frames
(Critically important)
This page does not use a frameset.
Mobile optimization
(Somewhat important)
No viewpoint tag is provided.
No Apple touch icon is specified.
This page only loads 1 JavaScript files. That's good!
Bold and strong tags
(Somewhat important)
The usage of strong and bold tags is perfect. We recommend the use of up to 16 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
/inc/img/nasa_logo.gifNASA Logo
/inc/img/swift_banner.jpgThe Neil Gehrels Swift Observatory
/inc/img/Swift.jpgSwift satellite artists conception
/inc/img/nasa_logo.gifNASA Logo
/inc/img/goddardsignature.pngGoddard Signature
Video URLWidthHeight
...om/embed/_4B5xZcTbf0?si=wYqHTYo_JtdY3xaR560315

Page structure

H1 heading
(Critically important)
National Aeronautics and Space Administration
Too many H1 headings
Headings
(Important)
The heading structure is perfect.

Heading structure

Heading levelContent
H1 National Aeronautics and Space Administration
H1 The Neil Gehrels Swift Observatory
H1 Swift Operations Status
H1 Swift Resources
H1 Latest Swift GRBs
H1 Latest Swift News
H2 Goddard Space Flight Center
H2 Swift Users Workshop, Aug 20, 2024
H2 ROSES-24 Amendment 23: D.5 Swift General Investigator Amendment: IXPE Joint Observing Program and Change to NuSTAR Exclusive-Use Period
H2 Jun 18, 2024
H3 Jul 19, 2024
H3 Jun 25, 2024
H3 Astronomers See a Massive Black Hole Awaken in Real Time
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 too many external links (26) on this page.

Found links on this page

LinkAttributesAnchor text
https://swift.gsfc.nasa.gov/Anchor Skip navigation and go straight to page content.
https://www.nasa.gov/External Subdomain IMG-ALT NASA Logo
https://www.nasa.gov/External Subdomain National Aeronautics and Space Administration
https://www.nasa.gov/goddardExternal Subdomain Goddard Space Flight Center
https://heasarc.gsfc.nasa.gov/External Subdomain HEASARC
https://science.gsfc.nasa.gov/External Subdomain Sciences and Exploration
https://heasarc.gsfc.nasa.gov/External Subdomain Text duplicate HEASARC
https://swift.gsfc.nasa.gov/Swift Home
/archive/Archive
/analysis/Data Analysis
/proposals/Proposals & Tools
https://imagine.gsfc.nasa.gov/...External Subdomain Education & Public Outreach
https://swift.gsfc.nasa.gov/IMG-ALT The Neil Gehrels Swift Observatory
/about_swift/About Swift
/sdc/ql/Quicklook Data
https://gcn.gsfc.nasa.gov/External Subdomain GCN
/results/Results
/operations/Operations
/related_sites.htmlRelated Sites
/gallery/Gallery
https://www.nasa.gov/feature/g...External Subdomain NASA Release
https://svs.gsfc.nasa.gov/14408External Subdomain Multimedia
https://www.nature.com/article...External Subdomain Nature Paper
https://swift.gsfc.nasa.gov/ba/GRB, BA, & TOO Contact Information
/results/transients/BAT Transient Lightcurves
https://pbrown801.github.io/SO...External Subdomain Swift Supernovae
https://www.swift.psu.edu/oper...External Subdomain Observing Schedule
/results/refereed/Journal Papers Related to Swift
/results/releases/Swift Press Release Image Archive
/about_swift/sug.htmlSwift User's Group (SUG)
/about_swift/participants/Swift Mission Participants
/archive/grb_table/240811AGRB 240811A
/archive/grb_table/240809AGRB 240809A
/archive/grb_table/240805BGRB 240805B
https://heasarc.gsfc.nasa.gov/...External Subdomain SWIFTGRB Gamma-Ray Burst Catalog
/archive/grb_table/Data Table of Swift Bursts
https://gcn.gsfc.nasa.gov/gcn3...External Subdomain GCN Circulars Archive
/news/2024/aug20_workshop.html+ Read More
https://nspires.nasaprs.com/ex...External Subdomain D.5 Neil Gehrels Swift Observatory General Investigator (GI) - Cycle 21
https://nspires.nasaprs.com/ex...External Subdomain D.5 Swift GI
https://solicitation.nasaprs.c...External Subdomain NASA research opportunity homepage
https://science.nasa.gov/resea...External Subdomain SARA's ROSES blog
https://www.eso.org/public/new...External Subdomain Text duplicate + Read More
https://swift.gsfc.nasa.gov/news/Other News
https://swift.gsfc.nasa.gov/team/Swift Team Pages
https://www.nasa.gov/External Subdomain Text duplicate IMG-ALT NASA Logo
https://www.nasa.gov/goddardExternal Subdomain IMG-ALT Goddard Signature
https://heasarc.gsfc.nasa.gov/...External Subdomain Questions/Comments/Feedback
https://www.nasa.gov/about/hig...External Subdomain Privacy Policy and Important Notices
https://www.nasa.gov/accessibi...External Subdomain Accessibility
https://www.nasa.gov/about/con...External Subdomain Contact NASA

Server configuration

HTTP redirects
(Critically important)
This page redirects to "https://swift.gsfc.nasa.gov/"
HTTP header
(Important)
The HTML page should be transferred using GZip compression.
The web server version is sent within the HTTP header.
No X-Powered HTTP header is sent.
Performance
(Somewhat important)
The page response time of 0.63 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.
This page only loads 1 CSS files. That's ok.
This page only loads 1 JavaScript files. That's good!
The file size of the HTML document is fine (15 kB).

HTTP Response Header

NameValue
dateSun, 18 Aug 2024 09:49:17 GMT
serverWebServer/1.0
x-frame-optionssameorigin
accept-rangesbytes
set-cookie132 Characters
connectionclose
content-typetext/html; charset=ISO-8859-1
strict-transport-securitymax-age=31536000; includeSubDomains
content-security-policyupgrade-insecure-requests
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 1,248 referring domains.
This page has 31,879 backlinks.
This page has backlinks from 863 different ip addresses.
Facebook popularity
(Somewhat important)
The page has 0 shares and comments on Facebook.

Links from Wikipedia

You can find more links using Wikipedia search

Robots.txt

No valid Robots.txt file was found.

Similar sites

Search preview

swift.gsfc.nasa.gov
The Neil Gehrels Swift Observatory
The Neil Gehrels Swift Observatory

Most important keywords

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

KeywordResultRecheck
Swift77%Check
Neil Gehrels Swift65%Check
Gehrels Swift Observatory65%Check
Neil Gehrels Swift Observatory64%Check
Neil63%Check
Gehrels63%Check
Observatory63%Check
Latest Swift59%Check
Swift Users56%Check
Swift GI55%Check
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