Overview of the SEO Check
Meta information
97% 
Page quality
83% 
Page structure
83% 
Link structure
81% 
Server
100% 
External factors
100% 
SEO Score
Response time
0.28 s
File size
98.40 kB
Words
726
Media files
27
Number of links
91 internal / 10 external

Task list of SEO Improvements

Meta specifications

Title
(Critically important)
Smithsonian Institution | Home
The length of the page title is perfect. (274 pixels out of 580 max pixel length)
There are no duplicate words in the title
Meta description
(Critically important)
The Smithsonian Institution is the world's largest museum, education, and research complex with 21 museums and the National Zoo.
The length of the meta description is perfect. (815 pixels out of 1000 max pixel length)
Crawlability
(Critically important)
There are no problems in accessing the website.
Canonical URL
(Important)
https://www.si.edu/
There is a valid canonical link 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)
The alternate link to the page itself is invalid.
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
descriptionThe Smithsonian Institution is the world's largest museum, education, and research complex with 21 museums and the National Zoo.
keywordsSmithsonian Institution
GeneratorDrupal 10 (https://www.drupal.org)
MobileOptimizedwidth
HandheldFriendlytrue
viewportwidth=device-width, initial-scale=1.0
langen
twitter:titleSmithsonian Institution | Home
og:titleSmithsonian Institution | Home
og:descriptionOfficial website of the Smithsonian, the world's largest museum and research complex, with 19 museums, 9 research centers, and affiliates around the world.
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 726 words. That's ok.
28.8% 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.
No placeholders texts or images were found.
There are no duplicates on the site.
The average number of words per sentence of 15.27 words is good.
Frames
(Critically important)
This page does not use a frameset.
Mobile optimization
(Somewhat important)
A viewport "width=device-width, initial-scale=1.0" 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 15 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
/sites/default/themes/siedu/logo.svgHome
.../s11e21-web_large.jpg.webp?itok=k2NOiJ9mdrawing of a turtle looking at hazards
...neers_of_flight_0.jpg.webp?itok=wEJ1vDAQAn artist's concept of the Barron Hilton Pioneers of Flight exhibition. In the center is a hanging silver airplane, a red airplane peaks out of the right. There are vertical panels with information on it.
...ad_1920x460_final.jpg.webp?itok=UJG363Y4Colorful collage of collection images.
...r/fs-f1904.61_006.jpg.webp?itok=A8MxmZTgHarmony in Blue and Gold The Peacock Room
...ommon_sense_photo.jpg.webp?itok=04Tvl9nSThomas Paine's "Common Sense" Pamphlet
...black-color-rgb_0.jpg.webp?itok=vV4lyC3WOur Shared Future 250 logo
...aser/3d-spacesuit.png.webp?itok=QEXsPIMy3D spacesuit scan.
...2018-10360-000001.jpg.webp?itok=oBXCVB9UU.S Army Curtiss R3C-2
...easer/30dorb_lg11.jpg.webp?itok=wijBx18XThe entire image is awash in intricate clouds, and swathes of superheated gas.
...aam-1968.151.32_1.jpg.webp?itok=p5VWvGYvwater color of mountain formation
...ic/blog/bison-010.jpg.webp?itok=OEbhFDgHAn American bison standing and looking at the camera.
...c/chsdm-chp6698-2.jpg.webp?itok=KfnLDkzpcommemorative facsimile of the signatures on the Declaration of Independence
...r/chsdm-297456_01.jpg.webp?itok=II_stt4gcolor wheel
...m-1980_2493_12364.jpg.webp?itok=gxL707zHFreedom of the press postage stamp.
...er/npg-8700536c_1.jpg.webp?itok=WXGsNCPMJudy Garland (with Mickey Rooney)Judy Garland (with Mickey Rooney)
.../s11e12-web_small.jpg.webp?itok=PzQ-cjQ2Illustration of a female astronaut standing proudly next to a rocket that says "United States."
.../s10e15-web_small.jpg.webp?itok=gleMRmopIllustration featuring a monkey face looking over trees and people with podcast equipment.
.../s10e01-web_small.png.webp?itok=ess6bHZYAn illustration of a group of muppets next to the Smithsonian castle.
.../s09e05-web_small.png.webp?itok=HcM8RYAjIllustration of Bill Nye waving in a blue lab coat as he enters through a side door.
...c/join-circles300.png.webp?itok=aZ1r-5-FCastle in spring.
...blic/se-mag-307_1.png.webp?itok=8jW3IQIJmagazine cover
...s300elephant-cher.png.webp?itok=VAzJOEU8Elephant with Cher
...-panda-circles300.png.webp?itok=fkbCuJ8wPanda
...ic/journey-circle.png.webp?itok=Bid8h9RNUpper Antelope Canyon in Arizona
...es/siedu/images/logo-secondary-white.svgHome

Page structure

H1 heading
(Critically important)
Smithsonian Homepage
The H1 heading is perfect.
Headings
(Important)
There are 33 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 Smithsonian Homepage
H2 Slideshow
H2 Shellshocked I: Turtles vs. The World arrow-right
H2 New Exhibitions Opening July 28 arrow-right
H2 Smithsonian Open Access arrow-right
H2 Welcome
H2 Plan Your Visit
H2 Explore our digital resources
H2 Featured
H2 Sidedoor Podcast
H3 Browse Topics
H3 Search our digital records
H3 Digital Backgrounds arrow-right
H3 An Eloquent Argument arrow-right
H3 Our Shared Future: 250 arrow-right
H3 Neil Armstrong's Space Suit arrow-right
H3 1925: A Year in the Collections arrow-right
H3 Mysteries of the Universe arrow-right
H3 America's National Parks: Stewardship and Wonder arrow-right
H3 Six Animals the Smithsonian Has Helped Save from Extinction arrow-right
H3 American Revolution arrow-right
H3 Color Journey arrow-right
H3 Freedom of the Press arrow-right
H3 Let's Go to the Movies arrow-right
H3 Right Stuff, Wrong Sex arrow-right
H3 Monkeyin' Around on the Devil's Island arrow-right
H3 The 'Gentle Anarchy' of the Muppets arrow-right
H3 Bill Nye the Sidedoor Guy arrow-right
H3 Membership arrow-right
H3 Magazine arrow-right
H3 Channel arrow-right
H3 Shop arrow-right
H3 Travel arrow-right
Some internal links have dynamic parameters. All internal URLs, which are not marked as nofollow, should not contain dynamic parameters.
Some anchor texts are used more than once.
The number of internal links is ok.
None of the anchor texts is too long.
There are 10 external links on this page.
LinkAttributesAnchor text
https://www.si.edu/Anchor Skip to main content
https://www.si.edu/Anchor Skip to main navigation
https://www.si.edu/myvisitheart-solid My Visit
https://www.si.edu/Anchor Donate
https://www.si.edu/IMG-ALT Home
A-TITLE Home
https://www.si.edu/visitOverview
https://www.si.edu/visit/museumsMuseums and Zoo
https://www.si.edu/visit/tipsEntry and Guidelines
https://www.si.edu/visit/mapsMaps and Brochures
/visit/dine-shopDine and Shop
/visit/accessibilityAccessibility
https://www.si.edu/visit/kidsVisiting with Kids
https://www.si.edu/visit/groupsGroup Visits
https://www.si.edu/whats-onText duplicate Overview
https://www.si.edu/exhibitionsExhibitions
https://www.si.edu/events/onlineOnline Events
https://www.si.edu/eventsAll Events
https://www.si.edu/theatersIMAX & Planetarium
https://www.si.edu/exploreText duplicate Overview
https://www.si.edu/exploreTopics
https://www.si.edu/collectionsCollections
https://www.si.edu/researchersResearch Resources
https://www.si.edu/podcastsPodcasts
https://www.si.edu/storiesStories
https://www.si.edu/learnText duplicate Overview
/learn/parents-and-caregiversFor Caregivers
https://www.si.edu/educatorsFor Educators
https://www.si.edu/learn/studentsFor Students
/learn/academicsFor Academics
/learn/lifelong-learnersFor Lifelong Learners
https://www.si.edu/supportText duplicate Overview
/support/membership?form=FUNAF...Become a Member
/support/membership?form=FUNAF...Renew Membership
/support/even-more-ways-give?f...Make a Gift
https://www.si.edu/volunteerVolunteer
https://www.si.edu/aboutText duplicate Overview
/about/administrationOur Organization
/about/leadershipOur Leadership
https://www.si.edu/about/reportsReports and Plans
https://www.si.edu/newsdeskNewsdesk
https://www.si.edu/myvisitText duplicate heart-solid My Visit
https://www.si.edu/Anchor Text duplicate Donate
/sidedoor/shellshocked-i-turtl...Shellshocked I: Turtles vs. The World arrow-right
https://airandspace.si.edu/abo...External Subdomain New Exhibitions Opening July 28 arrow-right
https://www.si.edu/openaccessSmithsonian Open Access arrow-right
https://www.si.edu/visit/museumsmuseum
A-TITLE Museums and Zoo
/about/educationeducation
A-TITLE Education Centers
/researchcentersresearch
A-TITLE Research Centers
https://www.si.edu/exploreExplore
A-TITLE Explore Smithsonian
https://www.si.edu/learnlearn
A-TITLE Learning with the Smithsonian
https://www.si.edu/exploreStart your journey
A-TITLE Explore Smithsonian
https://www.si.edu/visit/museums17 free DC-area museums and zoo
A-TITLE Museums and Zoo
https://www.cooperhewitt.org/External Subdomain Cooper Hewitt
https://www.si.edu/whats-onwhat's on
A-TITLE What’s On
https://www.si.edu/eventsevents
A-TITLE Event Calendar
https://www.si.edu/exhibitionsexhibitions
https://www.si.edu/visitPlan your visit
https://www.si.edu/explore/artArt & Design arrow-right
/explore/historyHistory & Culture arrow-right
/explore/scienceScience & Nature arrow-right
/explore/innovationInnovation & Technology arrow-right
/spotlight/backgroundsSubdomain Digital Backgrounds arrow-right
/newsdesk/snapshot/eloquent-ar...An Eloquent Argument arrow-right
https://www.si.edu/250Our Shared Future: 250 arrow-right
/spotlight/apollo11Subdomain Neil Armstrong's Space Suit arrow-right
https://www.si.edu/spotlight/1925Subdomain 1925: A Year in the Collections arrow-right
/explore/science/mysteries-uni...Subdomain Mysteries of the Universe arrow-right
/spotlight/national-parksAmerica's National Parks: Stewardship and Wonder arrow-right
/stories/six-animals-smithsoni...Six Animals the Smithsonian Has Helped Save from Extinction arrow-right
/spotlight/american-revolution...American Revolution arrow-right
/spotlight/color-smithsonianSubdomain Color Journey arrow-right
https://www.si.edu/spotlight/newsSubdomain Freedom of the Press arrow-right
/spotlight/moviesSubdomain Let's Go to the Movies arrow-right
https://www.si.edu/sidedoorSubdomain Smithsonian's flagship podcast
/sidedoor/right-stuff-wrong-sexRight Stuff, Wrong Sex arrow-right
/sidedoor/monkeyin-around-devi...Monkeyin' Around on the Devil's Island arrow-right
/sidedoor/gentle-anarchy-muppetsThe 'Gentle Anarchy' of the Muppets arrow-right
/sidedoor/bill-nye-sidedoor-guyBill Nye the Sidedoor Guy arrow-right
/support/membershipMembership arrow-right
https://www.smithsonianmag.com...External Subdomain Magazine arrow-right
https://www.smithsonianchannel...External Subdomain Channel arrow-right
https://www.si.edu/shopShop arrow-right
https://www.smithsonianjourney...External Subdomain Travel arrow-right
https://www.si.edu/Anchor arrow-up Back to top
https://www.si.edu/Text duplicate IMG-ALT Home
A-TITLE Home
https://www.facebook.com/smith...External Subdomain Facebook facebook
https://instagram.com/smithsonianExternal Instagram instagram
https://www.linkedin.com/compa...External Subdomain LinkedIn linkedin
https://www.youtube.com/c/smit...External Subdomain YouTube youtube
https://www.si.edu/contactsContact Us
https://www.si.edu/ohr/jobsJob Opportunities
https://www.si.edu/getinvolvedGet Involved
https://oig.si.edu/External Subdomain Inspector General
/ogc/records-requestsRecords Requests
https://www.si.edu/faqs/accessText duplicate Accessibility
https://www.si.edu/oeoEEO & Small Business
https://www.si.edu/shopShop Online
https://www.si.edu/specialeventsHost Your Event
https://www.si.edu/newsdeskPress Room
https://www.si.edu/privacyPrivacy
https://www.si.edu/termsofuseTerms of Use

Server configuration

HTTP redirects
(Critically important)
This page redirects to "https://www.si.edu/"
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 excellent with 0.28 seconds.
The file size of the HTML document is fine (98 kB).

HTTP Response Header

NameValue
dateMon, 21 Jul 2025 12:57:19 GMT
content-typetext/html; charset=UTF-8
content-encodingbr
cache-controlmax-age=3600, public
x-drupal-dynamic-cacheUNCACHEABLE (poor cacheability)
content-languageen
x-content-type-optionsnosniff
x-frame-optionsSAMEORIGIN
last-modifiedMon, 21 Jul 2025 12:29:26 GMT
varyCookie, Accept-Encoding
x-drupal-cacheHIT
referrer-policyno-referrer-when-downgrade
expiresMon, 21 Jul 2025 13:29:28 GMT
age230
cf-cache-statusHIT
server-timingcfCacheStatus;desc="HIT"
speculation-rules"/cdn-cgi/speculation"
servercloudflare
cf-ray962add06ac5cbb6f-CDG
alt-svch3=":443"; ma=86400
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 7,772 referring domains.
This page has 1,206,570 backlinks.
This page has backlinks from 3,807 different ip addresses.

Robots.txt

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# site through automated means, including any device, tool,
# or process designed to data mine or scrape content, is
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# artificial intelligence retrieval augmented generation or (2) with express
# written permission from this site’s operator.

# To request permission to license our intellectual
# property and/or other materials, please contact this
# site’s operator directly.

# BEGIN Cloudflare Managed content

User-agent: Amazonbot
Disallow: /

User-agent: Applebot-Extended
Disallow: /

User-agent: Bytespider
Disallow: /

User-agent: CCBot
Disallow: /

User-agent: ClaudeBot
Disallow: /

User-agent: Google-Extended
Disallow: /

User-agent: GPTBot
Disallow: /

User-agent: meta-externalagent
Disallow: /

# END Cloudflare Managed Content
#
# robots.txt
#
# This file is to prevent the crawling and indexing of certain parts
# of your site by web crawlers and spiders run by sites like Yahoo!
# and Google. By telling these "robots" where not to go on your site,
# you save bandwidth and server resources.
#
# This file will be ignored unless it is at the root of your host:
# Used:    http://example.com/robots.txt
# Ignored: http://example.com/site/robots.txt
#
# For more information about the robots.txt standard, see:
# http://www.robotstxt.org/robotstxt.html

User-agent: *
# CSS, JS, Images
Allow: /core/*.css$
Allow: /core/*.css?
Allow: /core/*.js$
Allow: /core/*.js?
Allow: /core/*.gif
Allow: /core/*.jpg
Allow: /core/*.jpeg
Allow: /core/*.png
Allow: /core/*.svg
Allow: /profiles/*.css$
Allow: /profiles/*.css?
Allow: /profiles/*.js$
Allow: /profiles/*.js?
Allow: /profiles/*.gif
Allow: /profiles/*.jpg
Allow: /profiles/*.jpeg
Allow: /profiles/*.png
Allow: /profiles/*.svg
# Directories
Disallow: /core/
Disallow: /profiles/
# Files
Disallow: /README.md
Disallow: /composer/Metapackage/README.txt
Disallow: /composer/Plugin/ProjectMessage/README.md
Disallow: /composer/Plugin/Scaffold/README.md
Disallow: /composer/Plugin/VendorHardening/README.txt
Disallow: /composer/Template/README.txt
Disallow: /modules/README.txt
Disallow: /sites/README.txt
Disallow: /themes/README.txt
Disallow: /web.config
# Paths (clean URLs)
Disallow: /admin/
Disallow: /comment/reply/
Disallow: /filter/tips
Disallow: /node/add/
Disallow: /search/
Disallow: /user/register
Disallow: /user/password
Disallow: /user/login
Disallow: /user/logout
Disallow: /media/oembed
Disallow: /*/media/oembed
# Paths (no clean URLs)
Disallow: /index.php/admin/
Disallow: /index.php/comment/reply/
Disallow: /index.php/filter/tips
Disallow: /index.php/node/add/
Disallow: /index.php/search/
Disallow: /index.php/user/password
Disallow: /index.php/user/register
Disallow: /index.php/user/login
Disallow: /index.php/user/logout
Disallow: /index.php/media/oembed
Disallow: /index.php/*/media/oembed
# Disallow security/CDN challenge paths
Disallow: /TSPD/

Search preview

www.si.edu
Smithsonian Institution | Home
The Smithsonian Institution is the world's largest museum, education, and research complex with 21 museums and the National Zoo.

Most important keywords

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

KeywordResultRecheck
Smithsonian79%Check
Smithsonian Institution70%Check
Smithsonian lens58%Check
Smithsonian Open Access54%Check
Museums51%Check
Zoo51%Check
Search50%Check
World50%Check
National50%Check
Homepage50%Check

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