Cancer.gov - SEO Checker

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Overview of the SEO Check
Meta information
100% 
Page quality
80% 
Page structure
79% 
Link structure
91% 
Server
80% 
External factors
100% 
SEO Score
Response time
0.81 s
File size
42.00 kB
Words
379
Media files
13
Number of links
42 internal / 11 external

Task list of SEO Improvements

Meta specifications

Title
(Critically important)
Comprehensive Cancer Information - NCI
The length of the page title is perfect. (370 pixels out of 580 max pixel length)
There are no duplicate words in the title
Meta description
(Critically important)
Accurate, up-to-date, comprehensive cancer information from the U.S. government's principal agency for cancer research.
The length of the meta description is perfect. (750 pixels out of 1000 max pixel length)
Crawlability
(Critically important)
There are no problems in accessing the website.
Canonical URL
(Important)
https://www.cancer.gov/
There is a valid canonical link specified.
Language
(Somewhat important)
Language detected in text: en
Language defined in HTML: en
Language defined in HTTP-Equiv meta tag: en
Server location: United States of America
The following language is defined by HTML: en
Alternate/Hreflang Links
(Somewhat important)
The specified alternate links have no errors.
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
descriptionAccurate, up-to-date, comprehensive cancer information from the U.S. government's principal agency for cancer research.
robotsindex
cgdp.domaincgov
cgdp.templatencids_without_title
dcterms.subjectNCI Homepage
dcterms.typecgvHomeLanding
dcterms.coveragenciglobal,ncienterprise
dcterms.isPartOfNCI Homepage
dcterms.isReferencedByevent1
dcterms.issued1980-01-01
x-no-opnone
GeneratorDrupal 10 (https://www.drupal.org)
MobileOptimizedwidth
HandheldFriendlytrue
viewportwidth=device-width, user-scalable=yes, initial-scale=1, minimum-scale=1
apple-mobile-web-app-titleCancer.gov
application-nameCancer.gov
langen
twitter:cardsummary
og:typeWebsite
og:urlhttps://www.cancer.gov/
og:titleComprehensive Cancer Information
og:descriptionAccurate, up-to-date, comprehensive cancer information from the U.S. government's principal agency for cancer research.
og:imagehttps://www.cancer.gov/sites/g/files/xnrzdm211/files/styles/cgov_social_media/public/cgov_image/media_image/2023-07/hero-image-homepage-promo.jpg
X-UA-CompatibleIE=edge
content-languageen
charsetutf-8

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Page quality

Content
(Critically important)
There are only 379 words on this page. Good pages should have about 800 words of useful content.
27.4% 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.
5 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 16.43 words is good.
Frames
(Critically important)
This page does not use a frameset.
Mobile optimization
(Somewhat important)
A viewport "width=device-width, user-scalable=yes, initial-scale=1, minimum-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 8 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)
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
...s/ncids_header/logos/Logo_NCI_Mobile.svgNational Cancer Institute Home Page
...o/2023-07/hero-image-homepage-mobile.jpgFemale medical professional reviewing results with a patient and caregiver.
...7/People Affected 16-9.jpg?itok=S4odN5HcCancer patient and caregiver speaking with a doctor.
...23-07/Researchers 16-9.jpg?itok=_AbpiXgNFemale researcher writes on a sample vial while sitting by a microscope.
...ctor-iStock.jpg?h=78148091&itok=qU20P-T2A young man with dark black hair and beard, form fitting orange shirt, with his hands in front of him speaking with a doctor.
... disruption.jpg?h=4233ef75&itok=FBADNI-JBreast tissue showing substantial changes.
...ddPCR image.jpg?h=f05db5fe&itok=Zcat_5jbA picture from below of a lab tech wearing a mask, safety glasses, and blue gloves dropping materials from a pipette into a 64-well plate.
.../Mole Check.jpg?h=f8bb546f&itok=1g7HQ6G5Doctor examines mole at base of person's neck.
...x9/2023-12/CIS-16-9-01.jpg?itok=zlnesrsoRepresentative on a headset helping a patient who has called in for assistance
...eature-card.gif?h=542dcc49&itok=LwX14miwIllustration of three scientists having a conversation.
...ing-article.jpg?h=24088f54&itok=iinxFI9wNational Cancer Institute Shady Grove campus.
...015-article.jpg?h=f8a4c3d2&itok=HIWvwPd3NCI advisory board members seated around a conference table.
...aring-HighResThumbnail.jpg?itok=pUJzM5rONo alt attribute provided

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 Improving the lives of all people through cancer research
H2 For People Affected by Cancer
H2 For Researchers
H2 Featured News and Research
H2 Common Moles, Dysplastic Nevi, and Risk of Melanoma
H2 Get Answers
H2 Our Organization
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 11 external links on this page.

Found links on this page

LinkAttributesAnchor text
https://www.cancer.gov/Anchor Skip to main content
https://www.cancer.gov/espanolEspañol
https://www.cancer.gov/IMG-ALT National Cancer Institute Home Page
/about-cancerAbout Cancer
https://www.cancer.gov/typesCancer Types
https://www.cancer.gov/researchResearch
/grants-trainingGrants & Training
/news-eventsNews & Events
https://www.cancer.gov/about-nciAbout NCI
https://www.cancer.gov/typesFind a Cancer Type
/about-cancer/treatmentTreatment
/about-cancer/treatment/side-e...Side Effects
/about-cancer/causes-preventionCauses & Prevention
/about-cancer/diagnosis-stagingDiagnosis & Staging
/research/participate/clinical...Find a Clinical Trial
/grants-training/grants-fundin...Funding Opportunities
/research/resourcesResources for Researchers
/grants-training/apply-grantApply for a Grant
/grants-training/grants-fundin...Find a Research Contact
/research/areasResearch Areas
/news-events/cancer-currents-b...Why Are Cancer Diagnoses Rising in People Under Age 50? Researchers are looking at environmental, lifestyle, and other factors as potential contributors.
IMG-ALT A young man with dark black hair and beard, form fitting orange shirt, with his hands in front of him speaking with a doctor.
/news-events/press-releases/20...Predicting Breast Cancer Aggressiveness Substantial changes in breast tissue may be associated with increased risk of aggressive breast cancer and poorer rat...
IMG-ALT Breast tissue showing substantial changes.
/news-events/cancer-currents-b...Rapid Genetic Test Could Help During Brain Cancer Surgery The experimental test identifies cancer-fueling mutations in tumor tissue during surgery.
IMG-ALT A picture from below of a lab tech wearing a mask, safety glasses, and blue gloves dropping materials from a pipette into a 64-well plate.
/types/skin/moles-fact-sheetLearn More
https://www.cancer.gov/contactGet Started
/about-nci/leadershipSenior Leaders Information about NCI senior leadership.
IMG-ALT Illustration of three scientists having a conversation.
/about-nci/organizationNCI Divisions, Offices, and Centers NCI has 30 divisions, offices, and centers who work together to build, maintain, and enhance a cohesive and comprehensive...
IMG-ALT National Cancer Institute Shady Grove campus.
/about-nci/advisory-boardsAdvisory Boards and Review Groups NCI relies on advisory committees to provide advice on the National Cancer Program, NCI scientific priorities, and more.
IMG-ALT NCI advisory board members seated around a conference table.
https://www.cancer.gov/Anchor Back To Top
/about-websiteAbout This Website
https://www.cancer.gov/espanolen Español
/policies/copyright-reuseReuse & Copyright
/social-mediaSocial Media
https://www.cancer.gov/contactContact Us
/publicationsPublications
/publications/dictionaries/can...Dictionary of Cancer Terms
/research/participate/clinical...Text duplicate Find a Clinical Trial
/policies/accessibilityAccessibility
/policies/foiaFOIA
/policies/privacy-securityPrivacy & Security
/policies/disclaimerDisclaimers
https://www.hhs.gov/vulnerabil...External Subdomain Vulnerability Disclosure
https://livehelp.cancer.gov/External Subdomain Live Chat
https://ncidccpssurveys.gov1.q...New window External Subdomain Site Feedback
https://www.facebook.com/cance...External Subdomain No Text
https://twitter.com/thenciExternal No Text
https://www.instagram.com/nati...External Subdomain No Text
https://www.youtube.com/NCIgovExternal Subdomain No Text
https://www.linkedin.com/compa...External Subdomain No Text
https://www.hhs.gov/External Subdomain U.S. Department of Health and Human Services
https://www.nih.gov/External Subdomain National Institutes of Health
https://www.cancer.gov/Subdomain National Cancer Institute
https://usa.gov/External USA.gov

Server configuration

HTTP redirects
(Critically important)
This page redirects to "https://www.cancer.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 0.81 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 (42 kB).

HTTP Response Header

NameValue
accept-rangesbytes
content-encodinggzip
content-languageen
content-typetext/html; charset=UTF-8
etag"1750964668"
last-modifiedThu, 26 Jun 2025 19:04:28 GMT
servernginx
x-age160289
x-ah-environment01live
x-cache-hits833
x-content-type-optionsnosniff
x-drupal-cacheMISS
x-drupal-dynamic-cacheMISS
x-frame-optionsSAMEORIGIN
x-generatorDrupal 10 (https://www.drupal.org)
x-request-idv-62337478-52c0-11f0-b49e-b3599663db8d
content-length9934
expiresMon, 30 Jun 2025 18:13:41 GMT
cache-controlmax-age=0, no-cache
pragmano-cache
dateMon, 30 Jun 2025 18:13:41 GMT
varyAccept-Encoding
strict-transport-securitymax-age=31536000 ; includeSubDomains ; preload
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 7,913 referring domains.
This page has 955,055 backlinks.
This page has backlinks from 5,371 different ip addresses.

Links from Wikipedia

You can find more links using Wikipedia search

Robots.txt

sitemap: https://www.cancer.gov/sitemap.xml
User-agent: *

Similar sites

Search preview

www.cancer.gov
Comprehensive Cancer Information - NCI
Accurate, up-to-date, comprehensive cancer information from the U.S. government's principal agency for cancer research.

Most important keywords

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

KeywordResultRecheck
Cancer81%Check
Cancer Information71%Check
Comprehensive Cancer71%Check
Cancer Research70%Check
comprehensive cancer information67%Check
NCI61%Check
Breast Cancer60%Check
Cancer Institute60%Check
National Cancer60%Check
gov59%Check
Show more keywords and terms

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