Giantmagellan.org - SEO Checker

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Overview of the SEO Check
Meta information
77% 
Page quality
80% 
Page structure
79% 
Link structure
86% 
Server
99% 
External factors
100% 
SEO Score
Response time
0.42 s
File size
104.00 kB
Words
512
Media files
8
Number of links
42 internal / 7 external

Task list of SEO Improvements

Meta specifications

Title
(Critically important)
Giant Magellan Telescope
The length of the page title is perfect. (232 pixels out of 580 max pixel length)
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)
https://giantmagellan.org/
There is a valid canonical link specified.
Language
(Somewhat important)
Language detected in text: en
Language defined in HTML: en-us
Server location: Germany
The following language is defined by HTML: en-us
Alternate/Hreflang Links
(Somewhat important)
Language for link pointing to page itself inaccurate
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 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
format-detectiontelephone=no
robotsindex, follow, max-image-preview:large, max-snippet:-1, max-video-preview:-1
msapplication-TileImagehttps://giantmagellan.org/wp-content/uploads/2021/11/cropped-favicon-270x270.png
article:modified_time2025-05-19T07:28:25+00:00
langen-us
twitter:cardsummary_large_image
twitter:imagehttps://giantmagellan.org/wp-content/uploads/2025/02/GMT-Feature-Image.jpg
og:localeen_US
og:locale:alternateko_KR
og:typewebsite
og:titleGiant Magellan Telescope
og:urlhttps://giantmagellan.org/
og:site_nameGiant Magellan Telescope
og:imagehttps://giantmagellan.org/wp-content/uploads/2025/02/GMT-Feature-Image.jpg
og:image:width1920
og:image:height1080
og:image:typeimage/jpeg
charsetUTF-8

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Page quality

Content
(Critically important)
This page contains 512 words. That's ok.
33.6% 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.
9 paragraphs were found on this page.
The text content is perfect.
No placeholders texts or images were found.
There are no duplicates on the site.
The average number of words per sentence of 13.38 words is good.
Frames
(Critically important)
This page does not use a frameset.
Mobile optimization
(Somewhat important)
A viewport "width+device-width, initial-scale=1" 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 10 tags for this page.
Image SEO
(Somewhat important)
7 images have no alt attribute. The content of alt attributes is used by search engines.
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
...t/uploads/2025/04/GMT-Night-2025_4-2.jpgNo alt attribute provided
.../Field-of-View-ELT-Comparison-v4-web.gifNo alt attribute provided
...loads/2025/04/Web-Cards_Astro-2020-2.jpgNo alt attribute provided
...ent/uploads/2025/04/Web-Cards_Rubin2.jpgNo alt attribute provided
...s/2024/12/GMTO-Founders-Map-2025_web.pngNo alt attribute provided
.../themes/gmto/dist/assets/i/facebook.jpegNo alt attribute provided
data:[...] Base64No alt attribute provided
Video URLWidthHeight
...ploads/2025/05/Shovel_Ready_progress.mp4

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 From the Universe to Everyday Life
H2 Global Endeavor
H2 This Website Uses Cookies
H3 Unmatched Capabilities
H3 Securing U.S. Leadership
H3 Maximizing Returns
H3 Real Progress
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 7 external links on this page.

Found links on this page

LinkAttributesAnchor text
https://giantmagellan.org/No Text
/explore-the-design/Explore the Design
/location/Location
/scientific-instruments/Scientific Instruments
/timeline/TIMELINE
/gallery/telescope-renderings/Telescope Renderings
/gallery/construction-site/Construction Site
/gallery/primary-mirrors/Primary Mirrors
/gallery/telescope-mount/Telescope Mount
/founders/Founders
/us-eltp/US-ELTP
/about-us/About Us
/leadership/Leadership
/social-impact/Social Impact
/employment/Employment
/contact-us/Contact Us
/news-and-events/News & Events
https://giantmagellan.org/es/es
/for-scientists/For Scientists
/2025/04/27/6-benefits-unique-...Discover our strengths
/americanimpact/See our competitive edge
/2025/04/27/6-observatories-be...Discover our synergies
/americanimpact/See our economic impact
/explore-the-design/Text duplicate Explore the Design
/location/Text duplicate Location
/scientific-instruments/Text duplicate Scientific Instruments
/timelineNew window Text duplicate TIMELINE
/gallery/telescope-renderings/Text duplicate Telescope Renderings
/gallery/construction-site/Text duplicate Construction Site
/gallery/primary-mirrors/Text duplicate Primary Mirrors
/gallery/telescope-mount/Text duplicate Telescope Mount
/founders/Text duplicate Founders
/us-eltp/Text duplicate US-ELTP
/about-us/About
/about-us/Text duplicate About Us
/leadership/Text duplicate Leadership
/social-impact/Text duplicate Social Impact
/employment/Text duplicate Employment
/contact-us/Text duplicate Contact Us
/news-and-events/Text duplicate News & Events
/for-scientists/Text duplicate For Scientists
https://instagram.com/giantmag...External No Text
http://www.facebook.com/GMTele...External Subdomain No Text
https://www.threads.net/@giant...External Subdomain No Text
http://twitter.com/giantmagellanExternal No Text
https://www.youtube.com/c/Gian...External Subdomain No Text
https://www.linkedin.com/compa...External Subdomain No Text
https://giantmagellan.org/New window Live camera
https://www.staging.giantmagel...External Subdomain Privacy Policy

Server configuration

HTTP redirects
(Critically important)
This page redirects to "https://giantmagellan.org/"
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 of 0.42 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 (104 kB).

HTTP Response Header

NameValue
content-typetext/html; charset=UTF-8
content-length23242
dateThu, 19 Jun 2025 09:48:02 GMT
serverApache
expiresThu, 19 Nov 1981 08:52:00 GMT
cache-controlno-store, no-cache, must-revalidate
pragmano-cache
link<https://giantmagellan.org/wp-json/>; rel="https://api.w.org/", <https://giantmagellan.org/wp-json/wp/v2/pages/9699>; rel="alternate"; title="JSON"; type="application/json", <https://giantmagellan.org/>; rel=shortlink
set-cookie44 Characters
varyAccept-Encoding
content-encodinggzip
strict-transport-securitymax-age=63072000; includeSubDomains; preload
permissions-policycamera=(), microphone=(), geolocation=(), interest-cohort=()
x-content-type-optionsnosniff
x-dns-prefetch-controlon
x-frame-optionsSAMEORIGIN
x-xss-protection1; mode=block
referrer-policysame-origin
content-security-policyupgrade-insecure-requests;
x-cacheMiss from cloudfront
via1.1 888b6b44a57f755881c4b0f069225010.cloudfront.net (CloudFront)
x-amz-cf-popFRA56-P11
x-amz-cf-idK_uCqNrRpDkNOpduWDBBEZOvQFBurXHC7G_aJKnqXFBtNW9lRLvU4w==
statuscode200
http_versionHTTP/2

External factors

This page is referenced by wikipedia.
This website has excellent links from other websites.
This page has backlinks from 1,811 referring domains.
This page has 60,825 backlinks.
This page has backlinks from 827 different ip addresses.

Links from Wikipedia

You can find more links using Wikipedia search

Robots.txt

# START YOAST BLOCK
# ---------------------------
User-agent: *
Disallow:

Sitemap: https://giantmagellan.org/sitemap_index.xml
# ---------------------------
# END YOAST BLOCK

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Search preview

giantmagellan.org
Giant Magellan Telescope

Most important keywords

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

KeywordResultRecheck
Giant59%Check
Magellan59%Check
Giant Magellan59%Check
Giant Magellan Telescope56%Check
Telescope51%Check
turn43%Check
telescopes39%Check
sci-fi39%Check
reality39%Check
universe38%Check
Show more keywords and terms

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