Ed.ted.com - SEO Checker

Sign up for free! PDF Export
Overview of the SEO Check
Meta information
89% 
Page quality
60% 
Page structure
93% 
Link structure
25% 
Server
77% 
External factors
100% 
SEO Score
Response time
0.90 s
File size
437.50 kB
Words
539
Media files
20
Number of links
100 internal / 15 external

Task list of SEO Improvements

Meta specifications

Title
(Critically important)
Lessons Worth Sharing | TED-Ed
The length of the page title is perfect. (296 pixels out of 580 max pixel length)
There are no duplicate words in the title
Meta description
(Critically important)
TED-Ed celebrates the ideas of teachers and students around the world. Discover hundreds of animated lessons, create customized lessons, and share your big ideas.
The meta description is too long: 1027 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: Canada
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)
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
csrf-paramauthenticity_token
csrf-token1jlKPaeoa_F_ICdk-Pdi_dSRvAF6iS-rgr_TqgatjLf6hRDO-pmw0PvKj1Cv6k7oHfF6nHZSxZXvtvLuPX6WAA
mp_$device_id08a89899-37d6-47b1-b792-a4416761695c
mp_$distinct_id$device:08a89899-37d6-47b1-b792-a4416761695c
mp_$current_urlhttps://ed.ted.com/
mp_ip116.202.182.111
mp_params{"controller":"pages","action":"index","format":"html"}
device_typedesktop
descriptionTED-Ed celebrates the ideas of teachers and students around the world. Discover hundreds of animated lessons, create customized lessons, and share your big ideas.
langen
twitter:cardsummary_large_image
twitter:site@TED_ED
twitter:titleLessons Worth Sharing
twitter:descriptionTED-Ed celebrates the ideas of teachers and students around the world. Discover hundreds of animated lessons, create customized lessons, and share your big ideas.
twitter:imagehttps://ed.ted.com/teded-logo-1200-670.png
og:titleLessons Worth Sharing
og:typewebsite
og:imagehttps://ed.ted.com/teded-logo-600-600.png
og:image:secure_urlhttps://ed.ted.com/teded-logo-600-600.png
og:urlhttps://ed.ted.com/
og:descriptionTED-Ed celebrates the ideas of teachers and students around the world. Discover hundreds of animated lessons, create customized lessons, and share your big ideas.
og:site_nameTED-Ed
X-UA-CompatibleIE=edge
charsetutf-8

Automatically check ed.ted.com including all subpages at once!

Try for free
Guaranteed free of charge during trial period.

Page quality

Content
(Critically important)
Some words from the page title are not used within the pages content
Only 1 paragraph/s was/were found on this page.
This page contains 539 words. That's ok.
26.5% of the text are stop words.
The page contains a listing, which indicates a good text layout.
No placeholders texts or images were found.
There are no duplicates on the site.
The average number of words per sentence of 13.5 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 11 tags for this page.
Image SEO
(Somewhat important)
11 images have no alt attribute. The content of alt attributes is used by search engines.
Social Networks
(Nice to have)
This page is optimized perfectly for social networks.
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://i.ytimg.com/vi/UsY-WfoKy80/0.jpgNo alt attribute provided
https://i.ytimg.com/vi/vcjQ5JkEE_0/0.jpgNo alt attribute provided
https://i.ytimg.com/vi/lq8TNKZVEWs/0.jpgNo alt attribute provided
https://i.ytimg.com/vi/qEJ4hkpQW8E/0.jpgNo alt attribute provided
https://i.ytimg.com/vi/wr3kUfW2fM0/0.jpgNo alt attribute provided
https://i.ytimg.com/vi/y3emv9DIEkE/0.jpgNo alt attribute provided
https://i.ytimg.com/vi/BXuyOPSDAYU/0.jpgNo alt attribute provided
https://i.ytimg.com/vi/dJoBnnCTP5M/0.jpgNo alt attribute provided
...ts/pages/index/explorations-a0708e35.jpgNo alt attribute provided
...ets/pages/index/collections-106d4743.jpgNo alt attribute provided
...ction/collections-create-01-4e3319ad.jpgNo alt attribute provided
...ssets/social/linkedin-black-fefba6be.pngLinkedInLinkedIn
...n.com/assets/social/youtube-2ffd5c2e.pngYouTubeYouTube

Page structure

H1 heading
(Critically important)
The H1 heading is empty
Headings
(Important)
There are 26 headings on the page. The amount of headings should be in a more proper relation to the amount of text.
Some headings do not have any content.

Heading structure

Heading levelContent
H1 Empty heading
H1 We create and curate the best educational content on the web
H2 Discover
H2 Create
H2 Get Involved
H2 Support
H2 Test yourself: Can you tell the difference between music and noise?
H2 Why your phone is making you sad
H2 What is Juneteenth, and why is it important?
H2 How the US is destroying young people’s future - Scott Galloway
H2 Harvey Milk's radical vision of equality
H2 2 questions to uncover your passion — and turn it into a career - Noeline Kirabo
H2 Is this the world's oldest animal fossil?
H2 When should you break a promise?
H2 What can you do with TED‑Ed?
H2 Customize lessons for your students
H2 Help your students share their ideas
H2 Share YOUR big idea in a TED-style talk
H2 Explorations
H2 TED-Ed Collections
H2 Create your own collection
H2 Discover ideas that spark curiosity
H2 Customize lessons for your kids
H2 Your child can share ideas worldwide
H3 Visit
H3 Follow us on
H3 Newsletter
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.
1 links don't have an anchor text.
The number of internal links is ok.
None of the anchor texts is too long.
There are 15 external links on this page.

Found links on this page

LinkAttributesAnchor text
https://ed.ted.com/Anchor Skip to main content
https://ed.ted.com/No Text
/lessons?sort=featured-positionLessonsWatch video-based lessons organized by subject and age
/ted_ed_collectionsCollectionsFind video-based lessons organized by theme
https://ed.ted.com/explorationsExplorationsLearn through interactive experiences created with other organizations
https://ed.ted.com/blogBlogRead articles and updates from TED-Ed
https://ed.ted.com/videosA LessonBuild your own video-based lesson
/create_a_collectionA CollectionOrganize video-based lessons in your own collection
https://ed.ted.com/student_talksStudent TalksLearn how students can create talks as part of a class, club or other program
https://ed.ted.com/educator_talksEducator TalksLearn how educators in your community can give their own TED-style talks
/nominate_an_educatorNominateNominate educators to work with TED-Ed
https://www.patreon.com/tededExternal Subdomain DonateDonate to support TED-Ed’s non-profit mission
https://ed.ted.com/shopShopBuy products inspired by TED-Ed animations
https://ed.ted.com/users/newRegister
https://ed.ted.com/sessionSign in
/lessons?sort=featured-positionLessons
/ted_ed_collectionsCollections
https://ed.ted.com/explorationsExplorations
https://ed.ted.com/blogBlog
https://ed.ted.com/videosA Lesson
/create_a_collectionA Collection
https://ed.ted.com/student_talksStudent Talks
https://ed.ted.com/educator_talksEducator Talks
/nominate_an_educatorNominate
https://www.patreon.com/tededNew window Nofollow External Subdomain Donate
https://ed.ted.com/shopNew window Nofollow Shop
https://ed.ted.com/helpHelp
https://ed.ted.com/contactContact
https://ed.ted.com/blogText duplicate Blog
https://ed.ted.com/aboutAbout
https://ed.ted.com/educatorEducators
https://ed.ted.com/patronsPatrons
/lessons/could-we-survive-prol...Subdomain No Text
https://ed.ted.com/Featured Lessons
https://ed.ted.com/?popular=1Popular Lessons
/?category=the-artsThe Arts
/?category=business-economicsBusiness & Economics
/?category=design-engineering-...Design, Engineering & Technology
/?category=healthHealth
/?category=literature-languageLiterature & Language
/?category=mathematicsMathematics
/?category=philosophy-religionPhilosophy & Religion
/?category=psychologyPsychology
/?category=science-technologyScience & Technology
/?category=social-studiesSocial Studies
/?category=teaching-educationTeaching & Education
/?category=thinking-learningThinking & Learning
/lessons/test-yourself-can-you...04:55
/lessons?category=the-artsText duplicate The Arts
/lessons/test-yourself-can-you...Test yourself: Can you tell the difference between music and noise?
/session/login?header=lessonA-TITLE Sign in to add Favorite
/session/login?header=lessonNofollow A-TITLE Sign in to add to Collection
/best_of_web/PKbcAyuc09:45
/lessons?category=psychologyText duplicate Psychology
/best_of_web/PKbcAyucWhy your phone is making you sad
/session/login?header=lessonText duplicate A-TITLE Sign in to add Favorite
/session/login?header=lessonNofollow Text duplicate A-TITLE Sign in to add to Collection
/lessons/when-did-slavery-actu...05:30
/lessons?category=social-studiesText duplicate Social Studies
/lessons/when-did-slavery-actu...What is Juneteenth, and why is it important?
/session/login?header=lessonText duplicate A-TITLE Sign in to add Favorite
/session/login?header=lessonNofollow Text duplicate A-TITLE Sign in to add to Collection
/lessons/how-the-us-is-destroy...18:38
/lessons?category=business-eco...Text duplicate Business & Economics
/lessons/how-the-us-is-destroy...How the US is destroying young people’s future - Scott Galloway
/session/login?header=lessonText duplicate A-TITLE Sign in to add Favorite
/session/login?header=lessonNofollow Text duplicate A-TITLE Sign in to add to Collection
/lessons/harvey-milk-s-radical...05:24
/lessons?category=social-studiesText duplicate Social Studies
/lessons/harvey-milk-s-radical...Harvey Milk's radical vision of equality
/session/login?header=lessonText duplicate A-TITLE Sign in to add Favorite
/session/login?header=lessonNofollow Text duplicate A-TITLE Sign in to add to Collection
/lessons/2-questions-to-uncove...11:07
/lessons?category=psychologyText duplicate Psychology
/lessons/2-questions-to-uncove...2 questions to uncover your passion — and turn it into a career - Noeline Kirabo
/session/login?header=lessonText duplicate A-TITLE Sign in to add Favorite
/session/login?header=lessonNofollow Text duplicate A-TITLE Sign in to add to Collection
/best_of_web/is-this-the-world...03:12
/best_of_web/is-this-the-world...Is this the world's oldest animal fossil?
/session/login?header=lessonText duplicate A-TITLE Sign in to add Favorite
/session/login?header=lessonNofollow Text duplicate A-TITLE Sign in to add to Collection
/lessons/the-ethical-dilemma-o...04:49
/lessons?category=philosophy-r...Text duplicate Philosophy & Religion
/lessons/the-ethical-dilemma-o...When should you break a promise?
/session/login?header=lessonText duplicate A-TITLE Sign in to add Favorite
/session/login?header=lessonNofollow Text duplicate A-TITLE Sign in to add to Collection
/lessons?sort=featured-positionNofollow See all lessons
https://ed.ted.com/educatorLearn more
https://ed.ted.com/users/newText duplicate Register
https://ed.ted.com/explorationsVisit now
/ted_ed_collectionsText duplicate Visit now
/create_a_collectionText duplicate Visit now
https://ed.ted.com/users/newText duplicate Register
https://ed.ted.com/parentText duplicate Learn more
https://ed.ted.com/users/newText duplicate Register
https://ed.ted.com/Subdomain No Text
https://ed.ted.com/helpText duplicate Help
https://ed.ted.com/aboutText duplicate About
https://ed.ted.com/contactText duplicate Contact
https://ed.ted.com/educatorText duplicate Educators
https://ed.ted.com/blogText duplicate Blog
https://ed.ted.com/patronsText duplicate Patrons
https://www.facebook.com/TEDEd...New window External Subdomain No Text
https://www.instagram.com/tede...New window External Subdomain No Text
https://twitter.com/TED_EDNew window External No Text
https://www.linkedin.com/compa...New window External Subdomain IMG-ALT LinkedIn
https://www.youtube.com/tededu...New window External Subdomain IMG-ALT YouTube
https://www.ted.com/termsofuseExternal Subdomain Terms of use
https://www.ted.com/privacyExternal Subdomain Privacy policy
https://policies.google.com/pr...New window External Subdomain Text duplicate Privacy policy
https://policies.google.com/termsNew window External Subdomain Terms of service
https://ted.com/External TED Conferences, LLC
https://www.ted.com/termsofuseExternal Subdomain Text duplicate Terms of use
https://www.ted.com/privacyExternal Subdomain Text duplicate Privacy policy
https://www.ted.com/about/our-...External Subdomain Video usage policy

Server configuration

HTTP redirects
(Critically important)
This page redirects to "https://ed.ted.com/"
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 0.90 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 (438 kB).

HTTP Response Header

NameValue
cache-controlmax-age=0, private, must-revalidate
content-encodinggzip
content-typetext/html; charset=utf-8
etagW/"89ec8d5486b09fe3e84670cdd69d5810"
link<//teded.tedcdn.com/assets/js/application-3dab04e0.css>; rel=preload; as=style; nopush,<//teded.tedcdn.com/assets/tailwind-f4a8f78f.css>; rel=preload; as=style; nopush,<https://ak.sail-horizon.com/spm/spm.v1.min.js>; rel=preload; as=script; nopush
nel{"report_to":"heroku-nel","response_headers":["Via"],"max_age":3600,"success_fraction":0.01,"failure_fraction":0.1}
referrer-policystrict-origin-when-cross-origin
report-to{"group":"heroku-nel","endpoints":[{"url":"https://nel.heroku.com/reports?s=WcB7TunBqvUI3BLvW6FiB4ugiSXXP%2F8CqzKgYKcJQzQ%3D\u0026sid=e11707d5-02a7-43ef-b45e-2cf4d2036f7d\u0026ts=1753519994"}],"max_age":3600}
reporting-endpointsheroku-nel="https://nel.heroku.com/reports?s=WcB7TunBqvUI3BLvW6FiB4ugiSXXP%2F8CqzKgYKcJQzQ%3D&sid=e11707d5-02a7-43ef-b45e-2cf4d2036f7d&ts=1753519994"
serverHeroku
set-cookie580 Characters
strict-transport-securitymax-age=63072000; includeSubDomains
varyAccept-Encoding
via2.0 heroku-router
x-content-type-optionsnosniff
x-frame-optionsSAMEORIGIN
x-permitted-cross-domain-policiesnone
x-request-id3f737f78-75b6-8f2f-9d3e-5396c01d1d76
x-runtime0.037416
x-xss-protection0
dateSat, 26 Jul 2025 08:53:15 GMT
statuscode200
http_versionHTTP/2

External factors

This website has excellent links from other websites.
This page has backlinks from 3,078 referring domains.
This page has 59,938 backlinks.
This page has backlinks from 2,232 different ip addresses.

Links from Wikipedia

No links from Wikipedia were found.

Robots.txt

User-agent: AHC/2.1
User-Agent: Amazonbot
User-Agent: Applebot-Extended
User-agent: Bytespider
User-agent: ChatGLM
User-agent: ClaudeBot
User-Agent: Facebookbot
User-Agent: Google-CloudVertexBot
User-Agent: Google-Extended
User-agent: GPTBot
User-Agent: Meta-ExternalAgent
User-Agent: Meta-ExternalFetcher
User-agent: PetalBot
User-agent: SemrushBot
User-agent: SemrushBot-SA
User-agent: Thinkbot
Disallow: /
DisallowAITraining: /

User-agent: *
Crawl-delay: 10
Disallow: /activities/
Disallow: /additional_information
Disallow: /ads/
Disallow: /best_of_web/*/flip
Disallow: /best_of_web/*/think
Disallow: /best_of_web/*/discuss
Disallow: /lessons/*/flip
Disallow: /lessons/*/think
Disallow: /lessons/*/discuss
Disallow: /lessons?category=*&
Disallow: /lessons?*student_level[]=
Disallow: /lessons?*content_type[]=
Disallow: /lessons?*subtitles[]=
Disallow: /lessons?*duration=
Disallow: /on/
Disallow: /*/*/discussions/
Disallow: /*/*/open/
Disallow: /*/*/guided/
Disallow: /u/
Disallow: /users/new
Disallow: /videos

Sitemap: https://teded.tedcdn.com/sitemaps/sitemap.xml.gz

Similar sites

Search preview

ed.ted.com
Lessons Worth Sharing | TED-Ed
TED-Ed celebrates the ideas of teachers and students around the world. Discover hundreds of animated lessons, create customized lessons, and share your big ideas.

Most important keywords

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

KeywordResultRecheck
TED79%Check
lessons66%Check
TED-Ed62%Check
Customize lessons60%Check
TED talk or YouTube59%Check
Create56%Check
ideas54%Check
Student54%Check
students54%Check
share54%Check
Show more keywords and terms

Automatically check ed.ted.com including all subpages at once!

Try for free
Guaranteed free of charge during trial period.

Cookie Policy

We use cookies to make our site work and also for analytics and advertising purposes. You can enable or disable optional cookies as desired. See the following links for more information.

Contact | Privacy

We need these so the site can function properly

So we can better understand how visitors use our website

So we can serve you tailored ads and promotions