Sanctuaries.noaa.gov - SEO Checker

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Overview of the SEO Check
Meta information
79% 
Page quality
59% 
Page structure
91% 
Link structure
80% 
Server
54% 
External factors
100% 
SEO Score
Response time
0.99 s
File size
78.80 kB
Words
905
Media files
28
Number of links
118 internal / 27 external

Task list of SEO Improvements

Meta specifications

Title
(Critically important)
NOAA Office of National Marine Sanctuaries
The length of the page title is perfect. (394 pixels out of 580 max pixel length)
There are no duplicate words in the title
Meta description
(Critically important)
From Washington state to the Gulf of America and from the Great Lakes to the Pacific Islands, the National Marine Sanctuary System protects 18 underwater parks spanning over 629,000 square miles of ocean and Great Lakes waters. By investing in innovative solutions, we strengthen these iconic places to address 21st-century challenges while supporting America's commerce and tourism. These unique locations inspire people to visit, value, and steward our nation’s iconic ocean and Great Lakes waters.
The meta description is too long: 3135 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
keywordssanctuary, sanctuaries, oceans, marine life, whales, coral, kelp, underwater parks, coast, chart, navigation, NOAA, National Oceanic and Atmospheric Administration, sea, Pacific, Atlantic, Arctic, Antarctic, Southern Ocean, Indian Ocean, beach, oceans, seas, beaches, reef, coral, wave, waves, climate, surf, ship, ships, boat, boats
descriptionFrom Washington state to the Gulf of America and from the Great Lakes to the Pacific Islands, the National Marine Sanctuary System protects 18 underwater parks spanning over 629,000 square miles of ocean and Great Lakes waters. By investing in innovative solutions, we strengthen these iconic places to address 21st-century challenges while supporting America's commerce and tourism. These unique locations inspire people to visit, value, and steward our nation’s iconic ocean and Great Lakes waters.
langen
X-UA-CompatibleIE=edge
charsetutf-8

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Page quality

Content
(Critically important)
Some words from the page title are not used within the pages content
Words from the H1 heading are not used in the page content.
This page contains 905 words. That's ok.
28.5% of the text are stop words.
The page contains a listing, which indicates a good text layout.
10 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 18.92 words is good.
Frames
(Critically important)
This page does not use a frameset.
Mobile optimization
(Somewhat important)
No Apple touch icon is specified.
This page loads 13 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 18 tags for this page.
Image SEO
(Somewhat important)
1 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
/media/img/logos/noaa-logo.pngNational Oceanic and Atmospheric Administration logo
/media/img/logos/onms-logo-no-text-74.pngnational marine sanctuaries logo
/media/maps/nms-system-map-1000.jpgnational marine Sanctuary system map
/media/img/20200414-ocnms-1000.jpgNo alt attribute provided
...a/img/2026-3dslice-1-ng26-0331a-1000.jpgHigh-resolution 3D bathymetric scan of the uss monitor looking at the bow and forward section. The ship's structural ribs are visible, and the image uses a heat-map color scale where reds and purples represent higher elevations and greens and blues represent the surrounding flat seafloor.
...20260223-coral-health-guardians-1000.jpgpeople pose together on a dive boat and hold up their coral ID cards
/media/videos/2026-saving-kohola.jpgAerial view of people on a boat working to disentangle a whale
...260123-virtualtour-sagenverse-header.jpgA Virtual rendering of the Florida Keys Eco-Discovery Center
...park-pc-cindy-among-serrao-noaa-1600.jpgPeople looking out at the ocean from the shore.
...akes-gala-tbiff-shannon-shikles-1000.jpgpeople in a theater watching a movie
...20220516-some-fin-shark-webinar-1000.jpgGray shark swimming just below the surface in turquoise waters with a wave crashing above and the blue sky with few white clouds.
...anseas-flag3-rachelplunkettnoaa-1000.jpgTwo scuba divers underwater holding a white flag that reads 'Goal Clean Seas Florida Keys' with the National Marine Sanctuary Foundation and National Marine Sanctuaries logos.
...lastics-sampling-chad-king-noaa-1000.jpgpeople in hats on a beach dump content from buckets into sieves
/media/img/giys-logo-1000.pngGet into Your Sanctuary
...nms-international-film-festival-1000.jpgEvent banner depicting still shots from various films to be shown.
...ia/img/2026-wscnms-film-festival-600.jpglionfish swimming near a reef
/news/feb15/lionfish-1000.jpglionfish swimming new a rocky bank
...nglobstertrap3-southpointdivers-1000.jpgThree scuba divers underwater using a bright orange lift bag to raise a heavy, wooden derelict lobster trap off the seabed.
...er-national-marine-sanctuary-poster.webpIllustrated poster of Mallows Bay-Potomac River National Marine Sanctuary. In the center, a large osprey with a fish in its talons flies over the water. In the background, an eagle soars over a sunset. The water is littered with sunken ship remnants and logs. A person in a kayak paddles through the debris. The text 'Mallows Bay-Potomac River National Marine Sanctuary' is at the top.
...ational-marine-sanctuary-poster-1200.jpgIllustrated poster of Thunder Bay National Marine Sanctuary showing scuba divers exploring a well-preserved wooden shipwreck underwater, with fish swimming nearby and a small sunken boat on the seabed.
/media/eib/2021-eib-logo-jpg-400.jpgearth is blue logo
/media/eib/1920s.jpgBright pink anemones and a barnacle
/media/eib/1919s.jpgA Hawaiian monk seal mother and pup lying on a beach
/media/eib/1897s.jpgHumpback whale underwater
/media/home/20191126-lake-ontario-1280.jpgWaves crash near a light house
...surfers-standing-on-beach-ocnms-1280.jpga surfer and bodyboarder standing on the beach looking at the water
...ome/kayakers-with-marine-debris-1280.jpga pair of kayakers with marine debris they collected on their kayak
Video URLWidthHeight
/media/videos/background.mp4

Page structure

H1 heading
(Critically important)
Go Beneath the Surface
The H1 heading is perfect.
Headings
(Important)
There are 29 headings on the page. The amount of headings should be in a more proper relation to the amount of text.

Heading structure

Heading levelContent
H1 Go Beneath the Surface
H2 National Marine Sanctuary System
H2 Sanctuary News
H2 Sanctuary Shorts
H2 Notes from the Field
H2 Get into Your Sanctuary
H2 National Marine Sanctuary System Posters
H2 Virtual Dives
H2 Stories from the Blue
H3 Eastern Region
H3 West Coast Region
H3 Pacific Islands Region
H3 Technology for Conservation
H3 Becoming an Iconic Reef Guardian: A Purposeful Dive in Florida Keys National Marine Sanctuary
H3 Stories from the Blue: Saving Koholā
H3 Explore the Florida Keys Sanctuary Virtual Tour
H3 30 Years and Counting: How Community Science Helps Track Humpback Whales Across Hawaiʻi
H3 Lights, Cameras, Sanctuaries! Thunder Bay National Marine Sanctuary Hosted Annual Film Festival
H3 Sanctuary Data Helps Reveal Why Tiger Sharks Converge Near Maui's Humpback Whale Nurseries
H3 Pod of Dolphins Greeted Divers Removing Debris in Florida Keys National Marine Sanctuary
H3 Following Microplastics from Shore to Sanctuary
H3 Attend the Inaugural Lake Ontario International Film Festival
H3 Attend the Second Annual Wisconsin Shipwreck Coast International Film Festival
H3 2026 Lionfish Invitational
H3 Clean Up Marine Debris in The Florida Keys
H3 Sanctuary Nomination Process
H3 Visit
H3 Get Involved
H4 Olympic Coast National Marine Sanctuary
Some internal link anchor texts are too long.
Some anchor texts are used more than once.
The number of internal links is ok.
All internal links are not using dynamic parameters.
There are too many external links (27) on this page.

Found links on this page

LinkAttributesAnchor text
https://www.noaa.gov/External Subdomain IMG-ALT National Oceanic and Atmospheric Administration logo
https://sanctuaries.noaa.gov/IMG-ALT national marine sanctuaries logo
https://sanctuaries.noaa.gov/National Marine Sanctuaries
https://sanctuaries.noaa.gov/Anchor Skip to main content
/visit/Visit
/visit/Visit Us
/visit/visitor-centers.htmlVisitor Centers & Exhibits
/visit/things-to-do.htmlThings to Do
/visit/giys.htmlGet into Your Sanctuary Day
/visit/ecosystems/Ecosystems
/wildlife-viewing/Wildlife Viewing
/news/News
/news/Latest News
/notes/Notes From the Field
/earthisblue.htmlEarth Is Blue
/magazine/Earth is Blue Magazine
/stories/Stories from the Blue
/news/media/For Media
/news/newsletter.htmlNewsletter
/management/fr_notices.htmlFederal Register Notices
/news/calendar/Calendar
/explore.htmlExplore
/explore.htmlOverview
/science/socioeconomic/Socioeconomics
/science/Science
/about/vessels/Small Boat Program
/maritime/Maritime Heritage
/marine-protected-areas/MPAs
http://www.nominate.noaa.gov/External Subdomain Nomination
/learn.htmlLearn
/learn.htmlText duplicate Overview
/education/Education
/about/history/History
/involved/Get Involved
/gallery/Multimedia
/gallery/Photos & Videos
/earthisblue.htmlText duplicate Earth Is Blue
/stories/Text duplicate Stories from the Blue
https://sanctuaries.noaa.gov/vr/Virtual Dives
/posters/Posters
/about/maps.htmlMaps
/live/Sanctuaries Live
/about/About
/about/Text duplicate Overview
/about/faqs/FAQs
/management/Policy & Planning
/about/regions.htmlRegions
/library/Publications
/jobs/Work For Us
/about/indigenous-peoples.htmlIndigenous Peoples
/espanol/Español
/contact.htmlContact
https://sanctuaries.noaa.gov/Anchor Dive In
/florida-keys/Florida Keys
/flower-garden-banks/Flower Garden Banks
/grays-reef/Gray's Reef
/hudson-canyon/Hudson Canyon (in designation)
/lake-erie/Lake Erie (in designation)
/lake-ontario/Lake Ontario
/mallows-potomac/Mallows Bay-Potomac River
/monitor/Monitor
/stellwagen-bank/Stellwagen Bank
/thunder-bay/Thunder Bay
/wisconsin/Wisconsin-Shipwreck Coast
/channel-islands/Channel Islands
/chumash-heritage/Chumash Heritage
/cordell-bank/Cordell Bank
/greater-farallones/Greater Farallones
/monterey-bay/Monterey Bay
/olympic-coast/Olympic Coast
/american-samoa/American Samoa
/hawaii-humpback-whale/Hawaii Humpback Whale
/pacific-remote-islands/Pacific Islands Heritage (in designation)
/papahanaumokuakea/Papahānaumokuākea
/news/Sanctuary News
https://monitor.noaa.gov/scien...External Subdomain Read
IMG-ALT High-resolution 3D bathymetric scan of the uss monitor looking at the bow and forward section. The ship's structural ribs are visible, and the image uses a h...
https://monitor.noaa.gov/scien...External Subdomain Technology for Conservation
/news/2026/becoming-an-iconic-...Text duplicate Read
IMG-ALT people pose together on a dive boat and hold up their coral ID cards
/news/2026/becoming-an-iconic-...Becoming an Iconic Reef Guardian: A Purposeful Dive in Florida Keys National Marine Sanctuary
/earthisblue/saving-kohola.htmlWatch
IMG-ALT Aerial view of people on a boat working to disentangle a whale
/earthisblue/saving-kohola.htmlStories from the Blue: Saving Koholā
/news/2026/florida-keys-virtua...Text duplicate Explore
IMG-ALT A Virtual rendering of the Florida Keys Eco-Discovery Center
/news/2026/florida-keys-virtua...Explore the Florida Keys Sanctuary Virtual Tour
/news/2026/how-community-scien...Text duplicate Read
IMG-ALT People looking out at the ocean from the shore.
/news/2026/how-community-scien...30 Years and Counting: How Community Science Helps Track Humpback Whales Across Hawaiʻi
https://sanctuaries.noaa.gov/newsRead more stories
/gallery/shorts/View more Sanctuary Shorts
/notes/Notes from the Field
/notes/2026/thunder-bay-intern...Text duplicate Read
IMG-ALT people in a theater watching a movie
/notes/2026/thunder-bay-intern...Lights, Cameras, Sanctuaries! Thunder Bay National Marine Sanctuary Hosted Annual Film Festival
/notes/2026/sanctuary-data-hel...Text duplicate Read
IMG-ALT Gray shark swimming just below the surface in turquoise waters with a wave crashing above and the blue sky with few white clouds.
/notes/2026/sanctuary-data-hel...Sanctuary Data Helps Reveal Why Tiger Sharks Converge Near Maui's Humpback Whale Nurseries
/notes/2026/pod-of-dolphins-gr...Text duplicate Read
IMG-ALT Two scuba divers underwater holding a white flag that reads 'Goal Clean Seas Florida Keys' with the National Marine Sanctuary Foundation and National Marine ...
/notes/2026/pod-of-dolphins-gr...Pod of Dolphins Greeted Divers Removing Debris in Florida Keys National Marine Sanctuary
/notes/2026/following-micropla...Text duplicate Read
IMG-ALT people in hats on a beach dump content from buckets into sieves
/notes/2026/following-micropla...Following Microplastics from Shore to Sanctuary
/notes/Read more notes
https://thunderbayfriends.org/...External Attend the Inaugural Lake Ontario International Film Festival
IMG-ALT Event banner depicting still shots from various films to be shown.
https://www.exploretworivers.c...External Subdomain Attend the Second Annual Wisconsin Shipwreck Coast International Film Festival
IMG-ALT lionfish swimming near a reef
https://flowergarden.noaa.gov/...External Subdomain 2026 Lionfish Invitational
IMG-ALT lionfish swimming new a rocky bank
https://marinesanctuary.org/go...External Clean Up Marine Debris in The Florida Keys
IMG-ALT Three scuba divers underwater using a bright orange lift bag to raise a heavy, wooden derelict lobster trap off the seabed.
/posters/mallows-potomac/IMG-ALT Illustrated poster of Mallows Bay-Potomac River National Marine Sanctuary. In the center, a large osprey with a fish in its talons flies over the water. In t...
/posters/thunder-bay/IMG-ALT Illustrated poster of Thunder Bay National Marine Sanctuary showing scuba divers exploring a well-preserved wooden shipwreck underwater, with fish swimming n...
https://sanctuaries.noaa.gov/50/50th anniversary
/posters/poster series
/posters/sanctuary posters
https://sanctuaries.noaa.gov/vr/Dive Into Your Sanctuaries
/earthisblue.htmlIMG-ALT earth is blue logo
/earthisblue/submissions.htmlSubmit your own photos
https://www.facebook.com/NOAAO...External Subdomain No Text
https://twitter.com/sanctuariesExternal No Text
https://instagram.com/noaasanc...External No Text
https://www.youtube.com/user/s...External Subdomain No Text
https://noaasanctuaries.tumblr...External Subdomain No Text
https://www.linkedin.com/showc...External Subdomain No Text
/earthisblue.htmlView More Photos
/stories/What does the National Marine Sanctuary System mean to you?
https://nominate.noaa.gov/External Subdomain nominate.noaa.gov
/visit/Plan your visit
/involved/How you can help
https://sanctuaries.noaa.gov/Home
/visit/Text duplicate Visit
/news/Text duplicate News
/explore.htmlText duplicate Explore
/learn.htmlText duplicate Learn
/involved/Text duplicate Get Involved
/gallery/Text duplicate Photos & Videos
/about/Text duplicate About
/contact.htmlText duplicate Contact
/about/work-with-us.htmlJobs
https://www.facebook.com/NOAAO...External Subdomain No Text
https://twitter.com/sanctuariesExternal No Text
https://instagram.com/noaasanc...External No Text
https://www.youtube.com/user/s...External Subdomain No Text
https://noaasanctuaries.tumblr...External Subdomain No Text
https://www.linkedin.com/showc...External Subdomain No Text
/accessibility-statement.htmlAccessibility
/disclaimer.htmlDisclaimer
https://www.noaa.gov/foia-free...External Subdomain Freedom of Information Act
https://www.noaa.gov/organizat...External Subdomain Information Quality
/about/privacy.htmlPrivacy Policy
https://touchpoints.app.cloud....External Subdomain User Survey
https://oceanservice.noaa.gov/External Subdomain National Ocean Service
http://www.noaa.gov/External Subdomain NOAA
https://www.commerce.gov/External Subdomain Department of Commerce

Server configuration

HTTP redirects
(Critically important)
This page redirects to "https://sanctuaries.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 of 0.99 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 loads 10 CSS files. This may affect the page load time negatively.
This page loads 13 JavaScript files. This may affect the load time negatively.
The file size of the HTML document is fine (79 kB).

HTTP Response Header

NameValue
dateFri, 13 Mar 2026 16:51:49 GMT
content-typetext/html
content-length22741
connectionkeep-alive
content-encodinggzip
varyAccept-Encoding
strict-transport-securitymax-age=31536000
arr-disable-session-affinityTrue
x-content-type-optionsNOSNIFF
x-frame-optionsSAMEORIGIN
x-permitted-cross-domain-policiesmaster-only
x-xss-protection1; mode=block
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 555 referring domains.
This page has 1,092 backlinks.
This page has backlinks from 263 different ip addresses.

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Robots.txt

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sanctuaries.noaa.gov
NOAA Office of National Marine Sanctuaries
From Washington state to the Gulf of America and from the Great Lakes to the Pacific Islands, the National Marine Sanctuary System protects 18 underwater parks spanning over 629,000 square miles of ocean and Great Lakes waters. By investing in innovative solutions, we strengthen these iconic places to address 21st-century challenges while supporting America's commerce and tourism. These unique locations inspire people to visit, value, and steward our nation’s iconic ocean and Great Lakes waters.

Most important keywords

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

KeywordResultRecheck
Marine70%Check
National70%Check
National Marine70%Check
National Marine Sanctuaries69%Check
Marine Sanctuaries68%Check
Sanctuaries62%Check
National Marine Sanctuary61%Check
National Marine Sanctuary System61%Check
System58%Check
Marine Sanctuary58%Check
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