Computerhistory.org - SEO Checker

Overview of the SEO Check
Meta information
64% 
Page quality
77% 
Page structure
58% 
Link structure
76% 
Server
100% 
External factors
100% 
SEO Score
Response time
0.20 s
File size
91.80 kB
Words
620
Media files
14
Number of links
79 internal / 10 external

Task list of SEO Improvements

Meta specifications

Title
(Critically important)
Home - CHM
The page title is too short. (119 pixels of 580 max pixel length) Optimize title
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://computerhistory.org/
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)
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=1.0
robotsindex, follow, max-image-preview:large, max-snippet:-1, max-video-preview:-1
google-site-verificationYn3JMKeiLvajp8ng2GZpR6eYm_wjIQflmPShjD5O8cY
article:publisherhttps://www.facebook.com/computerhistory/
article:modified_time2024-08-26T16:44:23+00:00
langen
twitter:cardsummary_large_image
twitter:site@ComputerHistory
og:localeen_US
og:typewebsite
og:titleHome
og:urlhttps://computerhistory.org/
og:site_nameCHM
X-UA-CompatibleIE=edge
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 620 words. That's ok.
29.7% of the text are stop words.
The page contains a listing, which indicates a good text layout.
13 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 17.45 words is good.
Frames
(Critically important)
This page does not use a frameset.
Mobile optimization
(Somewhat important)
No Apple touch icon is specified.
A viewport "width=device-width, initial-scale=1.0" is provided.
Bold and strong tags
(Somewhat important)
The usage of strong and bold tags is perfect. We recommend the use of up to 12 tags for this page.
Image SEO
(Somewhat important)
2 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.

Page structure

H1 heading
(Critically important)
CHM Decodes Technology for Everyone
The H1 heading is perfect.
Headings
(Important)
Some headings occur twice on the page.
The structure of headings is missing one or more levels. Do not skip heading levels.
There are 41 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 CHM Decodes Technology for Everyone
H2 Exhibits & Showcases
H2 Upcoming Events
H2 Discover More at CHM
H2 In the News
H2 From Our Blogs
H2 Activities & Resources
H2 CHM on YouTube
H2 HELP US TELL THE FULL STORY
H2 Hours and Directions
H4 Revolution: The First 2000 Years of Computing
H4 Make Software: Change the World!
H4 Little Emoji, Big Story
H4 The Geography of Hope
H4 Heroes Never Die
H4 Tours
H4 Exhibits
H4 Collections
H4 Source Code
H4 Timelines
H4 Fellow Awards
H4 Neural Network Chip Joins the Collection
H4 Election Night 1952
H4 Tech and the Evolution of News
H4 Roblox
H4 Minecraft: Education Edition
H4 Revolution Virtual Scavenger Hunt
H4 CHM Live
H4 Make Software: Change the World! Duplicate text
H4 CHM YouTube Shorts
H5 Empty heading
H5 Empty heading
H5 Empty heading
H5 Empty heading
H5 Empty heading
H5 Visit
H5 Visit Duplicate text
H5 EXPLORE
H5 playlist
H5 Explore
H5 Awards
H5 CHM BLOG
H5 CHM BLOG Duplicate text
H5 CHM BLOG Duplicate text
H5 Game for Grades 3–8
H5 Empty heading
H5 Activity for Grades 6–12
H5 Empty heading
H5 Empty heading
H5 Empty heading
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 10 external links on this page.
LinkAttributesAnchor text
https://computerhistory.org/IMG-ALT Computer History Museum Logo
A-TITLE Computer History Museum home link
https://donate.computerhistory...External Subdomain Donate
https://connect.computerhistor...External Subdomain Tickets
/explore/Explore
/explore/Overview
/activities-resources/Activities & Resources
/collections/Collections
/timelines/Timelines
/blogs/Blogs
/stories/Stories
/playlists/Playlists
/visit/Visit
/visit/Text duplicate Overview
/plan-your-visit/Plan Your Visit
/exhibits/Exhibits
/tours/Tours
/visit/group-visits/Group Visits
/events/Events
/venue/Venue
/about/About
/about/Text duplicate Overview
/this-is-chm/This Is CHM
/fellow-awards/Awards
/programs/Programs
/press-releasesNews
/leadership/Leadership
https://computerhistory.org/join/Join & Give
https://computerhistory.org/join/Text duplicate Overview
/membership/Membership
/ways-to-give/Ways to Give
/donor-recognition/Donor Recognition
/institutional-supporters/Institutional Supporters
/volunteers/Volunteers
https://donate.computerhistory...External Subdomain Text duplicate Donate
https://connect.computerhistor...External Subdomain Text duplicate Tickets
/hours-admission/Hours & Admission
/subscribe/Subscribe
/chm-events/Upcoming CHM Events
/collections/search/Subdomain Or search the collection catalog
/hours-admission/Holidays and Closures
/exhibits/View All
/exhibits/revolution/Revolution: The First 2000 Years of Computing Revolution features 19 galleries, 1,100 objects, and inspiring stories from the pioneers and innovators who sta...
/exhibits/make-softwareMake Software: Change the World! Make Software explores the history, impact, and technology behind seven game-changing applications: MP3, Photoshop, MRI, Car...
/exhibits/little-emoji-big-story/Little Emoji, Big Story Little Emoji, Big Story is a wall display that explores the origins of emojis, how new emojis are selected, and the stories of change...
/exhibits/Text duplicate View All
/eventsText duplicate View All
/events/the-geography-of-hope/The Geography of Hope Tue, Oct, 8, 7:00PM
/events/heroes-never-die/Heroes Never Die Tue, Dec, 10, 7:00PM
/eventsText duplicate View All
/tours/Text duplicate IMG-ALT Tours
/tours/Visit Tours
/exhibits/Text duplicate IMG-ALT Exhibits
/exhibits/Visit Exhibits
/collections/Text duplicate IMG-ALT Collections
/collections/EXPLORE Collections
/playlists/source-code/IMG-ALT Source Code
/playlists/source-code/playlist Source Code
/timelines/Text duplicate IMG-ALT Timelines
/timelines/Explore Timelines
/fellow-awards/IMG-ALT Fellow Awards
/fellow-awards/Awards Fellow Awards
/blog/in-memoriam-lynn-conway-...CHM Fellow
/programs/2024-fellow-awards/2024 Fellow Awards
/blogs-allView all
/blog/neural-network-chip-join...CHM BLOG Neural Network Chip Joins the Collection New additions to the collection, including a pair of Intel 80170 ETANNN chips, help to tell the story of ea...
/blog/election-night-1952/CHM BLOG Election Night 1952 Author Ira Chinoy explores the first use of computer forecasting in the 1952 election.
/blog/tech-and-the-evolution-o...CHM BLOG Tech and the Evolution of News Experts weigh in on how the evolution of different technologies—along with politics and other influences—has affected...
/blogs-allText duplicate View all
/activities-resources/Text duplicate View All
/techquest/Game for Grades 3–8 Roblox In CHM's TechQuest on Roblox, explore how tech is used in the real world today in two unique worlds—conservation and automation. U...
https://education.minecraft.ne...External Subdomain Minecraft: Education Edition The Great Tech Story, the Museum’s world in Minecraft: Education Edition, inspires and empowers students from ages 8–16 to becom...
/revolution-virtual-scavenger-...Activity for Grades 6–12 Revolution Virtual Scavenger Hunt Discover the treasures of Revolution: The First 2,000 Years of Computing. Our virtual scavenger hu...
/activities-resources/Text duplicate View All
https://www.youtube.com/user/C...External Subdomain Text duplicate View All
https://www.youtube.com/playli...External Subdomain CHM Live CHM Live convenes today’s thought leaders and experts for conversations and debate about the complexities and opportunities presented by technology....
https://www.youtube.com/playli...External Subdomain Make Software: Change the World! Explore these mini-documentaries from our exhibit, Make Software: Change the World! Learn about the history, impact, and tec...
https://www.youtube.com/@Compu...External Subdomain CHM YouTube Shorts Explore cultural moments in tech history, discover the strange and interesting stories behind unique artifacts, meet the pioneers who crea...
https://www.youtube.com/user/C...External Subdomain Text duplicate View All
https://computerhistory.org/Text duplicate IMG-ALT Computer History Museum Logo
A-TITLE Computer History Museum home link
/terms/Terms of Use
/privacy/Privacy
/press-releases/Press
https://computerhistory.org/jobs/Careers
/venue/Text duplicate Venue
/events/Text duplicate Events
/stories/Text duplicate Stories
/donate-now/Text duplicate Donate
/make-plan/Hours & Directions
/contact-us/More Contact Info

Server configuration

HTTP redirects
(Critically important)
This page redirects to "https://computerhistory.org/"
HTTP header
(Important)
No X-Powered HTTP header is sent.
This page uses GZip for compressed data transmission.
Performance
(Somewhat important)
The page response time is excellent with 0.20 seconds.
The file size of the HTML document is fine (92 kB).

HTTP Response Header

NameValue
cache-controlpublic, max-age=600
content-encodinggzip
content-typetext/html; charset=UTF-8
link<https://computerhistory.org/wp-json/>; rel="https://api.w.org/"
servernginx
strict-transport-securitymax-age=300
x-pantheon-styx-hostnamestyx-fe4-b-96b8c6b8b-2wjb9
x-styx-req-idd85038db-78fa-11ef-bfb1-c617013bd09f
dateSun, 22 Sep 2024 15:56:00 GMT
x-served-bycache-chi-klot8100118-CHI, cache-fra-eddf8230025-FRA
x-cacheHIT, HIT
x-cache-hits1, 0
x-timerS1727020560.186269,VS0,VE11
varyAccept-Encoding, Cookie, Cookie
age135
accept-rangesbytes
via1.1 varnish, 1.1 varnish
content-length27848
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 18,983 referring domains.
This page has 666,922 backlinks.
This page has backlinks from 11,751 different ip addresses.

Robots.txt

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

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

Search preview

computerhistory.org
Home - CHM

Most important keywords

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

KeywordResultRecheck
CHM68%Check
Story58%Check
CHM YouTube55%Check
Tech54%Check
CHM Live54%Check
Technology50%Check
history50%Check
computer50%Check
Decodes50%Check
Big Story50%Check

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