www.nih.gov

https://www.nih.gov/health-information

Scanned on May 2, 2026

Overall

SEO

64/100 passed

AEO

26/52 passed

GEO

33/58 passed

123

Passed

Failed

210

Total Checks

Poor

Rating

Quick Wins — Top 5 Issues to Fix

✗3 title tags found — should be exactly 1meta
✗No theme-color meta tag — improves mobile browser appearancemeta
✗Heading hierarchy has gaps (e.g. H1 to H3 without H2)content
✗42% long sentences (>20 words) — break up for readabilitycontent
✗14 images missing width/height — causes layout shift (CLS)content

SEO — 64/100 (36 issues)

Failed Checks (36)

✗3 title tags found — should be exactly 1meta
✗No theme-color meta tag — improves mobile browser appearancemeta
✗Heading hierarchy has gaps (e.g. H1 to H3 without H2)content
✗42% long sentences (>20 words) — break up for readabilitycontent
✗14 images missing width/height — causes layout shift (CLS)content
✗12 of 24 images use legacy formats (JPG/PNG/GIF) — convert to WebP/AVIF for 25-50% smaller filescontent
✗2 non-descriptive link text(s) found ("learn more"...) — use descriptive anchor text for SEOcontent
✗Missing og:descriptionsocial
✗Missing og:image — social shares will lack visualssocial
✗Missing twitter:descriptionsocial
✗Missing twitter:imagesocial
✗No apple-touch-icon — iOS home screen will lack custom icontechnical
✗No hreflang tags — add if targeting multiple languagestechnical
✗Text-to-HTML ratio: 7.5% — too code-heavy, add more contenttechnical
✗4 render-blocking scripts — add defer or async attributeperformance
✗No font preload/preconnect — add for faster renderingperformance
✗No author byline — add "By [Name]" for E-E-A-T trusttrust
✗No JSON-LD structured data foundschema
✗2 HTTP resource(s) on HTTPS page — security risktechnical
✗robots.txt does not reference Sitemap — add Sitemap: URLtechnical
✗2 target="_blank" links missing rel="noopener" — security risksecurity
✗No Web App Manifest — add for installability and modern web signalstechnical
✗No dns-prefetch or preconnect hints — add for faster third-party loadingperformance
✗Only 1 first-person pronouns — add personal experience (E-E-A-T)content
✗Only 13% responsive images — add srcset for mobilecontent
✗No max-image-preview:large — add to robots meta for Google Discovermeta
✗No Referrer-Policy header — may leak URL datasecurity
✗No Permissions-Policy — restrict camera/mic/geo accesssecurity
✗H1 length: 18 characters — too short, aim for 20-70content
✗114 links on page — exceeds 100 limit, may dilute link equitycontent
✗3 render-blocking script(s) in head — add defer or asyncperformance
✗1 duplicate ID(s) found: "affiliate" (2x) — must be unique per HTML specaccessibility
✗1 iframe(s) without sandbox attribute — security risksecurity
✗No RSS/Atom feed in <head> — add for content discovery by aggregators and AItechnical
✗No IndexNow integration — add for instant Bing/Yandex indexing on content changestechnical
✗1 of 4 H2 sections have < 50 words — add more content or merge thin sectionscontent

Passed Checks (64)

✓Title tag found: "Health Information | National Institutes of Health (NIH)"meta
✓Title length: 56 characters (optimal)meta
✓Meta description found (156 chars)meta
✓Description length: 156 chars (optimal)meta
✓Viewport meta tag found (mobile-friendly)meta
✓UTF-8 charset declaredmeta
✓Language attribute set on HTML tagmeta
✓No meta refresh redirect (good)meta
✓Robots: "index, follow"meta
✓meta keywords tag found — deprecated since 2009, Google ignores it. Remove to keep HTML cleanmeta
✓Single H1 tag foundcontent
✓Title-H1 alignment: 50% word overlap (good)content
✓4 H2 tags foundcontent
✓771 words on page (good content depth)content
✓Readability: 40 (moderate — aim for 60+)content
✓All 24 images have ALT textcontent
✓JS-based lazy loading detectedcontent
✓62 internal links foundcontent
✓49 external links foundcontent
✓No empty href attributes foundcontent
✓Open Graph title foundsocial
✓Open Graph URL foundsocial
✓og:type set to "Article"social
✓og:site_name: "National Institutes of Health (NIH)"social
✓Twitter Card: "summary"social
✓Twitter title foundsocial
✓HTTPS enabledtechnical
✓Canonical tag foundtechnical
✓Canonical tag is self-referencing (correct)technical
✓Favicon foundtechnical
✓Compression: gziptechnical
✓URL length: 38 chars (good)technical
✓URL uses hyphens or no separators (good)technical
✓URL is lowercase (good)technical
✓No deprecated HTML tags foundtechnical
✓Inline CSS: 0.0 KB (acceptable)performance
✓Inline JS: 5.4 KB (acceptable)performance
✓Cache-Control: max-age=900, publicperformance
✓HSTS header present — enforces HTTPSsecurity
✓X-Content-Type-Options: nosniffsecurity
✓Content-Security-Policy header presentsecurity
✓About page link found — builds trust and E-E-A-Ttrust
✓Contact page/email link foundtrust
✓Privacy Policy link foundtrust
✓Terms of Service link foundtrust
✓<!DOCTYPE html> declaredtechnical
✓Viewport includes width=device-width (responsive)meta
✓robots.txt found and allows crawlingtechnical
✓No AI crawlers blocked in robots.txt — AI search and training can access contenttechnical
✓sitemap.xml found with valid formattechnical
✓Sitemap contains 2599 URL(s)technical
✓All 5 checked internal links are workingcontent
✓0% nofollow links (0/112) — good link equity flowcontent
✓URL contains title keywords (50% match)technical
✓Title uses "|" separator — Google may rewrite it; consider using "—" insteadmeta
✓Title and meta description are different (good)meta
✓OG URL matches canonical URL (consistent)social
✓Viewport allows zoom (good for accessibility)accessibility
✓DOM size: ~643 elements (good)performance
✓No snippet blocking detected (good — content is fully accessible)technical
✓Trailing slash consistent between URL and canonicaltechnical
✓2 third-party script domain(s) (acceptable)performance
✓ARIA landmarks present: main, nav, skip-linkaccessibility
✓All 2 form input(s) have labels or aria-labelsaccessibility

AEO — 50/100 (26 issues)

Failed Checks (26)

✗No structured data — AI systems struggle to categorize your pagediscoverability
✗Missing meta description or og:description — unclear topic for AIdiscoverability
✗No definition lists (<dl>) — great for term/value pairsdiscoverability
✗No code blocks — add <code>/<pre> for technical contentdiscoverability
✗No FAQ section found — add Q&A content for AI citationstructure
✗No question-style headings — try "How to...", "What is..."structure
✗No data tables — tables help AI compare and cite datastructure
✗No numbered steps or ordered lists — add for "how to" AI answersstructure
✗Few key-value patterns — use "**Label:** value" format for AIstructure
✗No author information — AI values attributed contentcitation
✗No Organization schema — AI may not recognize your brandcitation
✗Only 2/5 E-E-A-T signals — add about, contact, author infocitation
✗No Speakable schema — add for voice assistant optimizationvoice
✗First paragraph too short for AI snippetsvoice
✗No SearchAction schema — add for enhanced search presencevoice
✗Avg 26 words/sentence — simplify for AI and voicevoice
✗No summary section — add Key Takeaways for AI extractionvoice
✗Few Q&A blocks — add question headings followed by answer paragraphsvoice
✗No /llms.txt found — add one to guide AI crawlers (emerging standard)discoverability
✗No sameAs links in schema — add social profiles for brand recognitioncitation
✗Content not updated in 90+ days — stale content loses AI visibilitycitation
✗No Table of Contents — add jump links for AI content navigationstructure
✗No video content — multimedia increases AI engagement and citation ratediscoverability
✗Statistics lack source references — attribute data to boost AI trustcitation
✗No <details>/<summary> elements — use for expandable Q&A contentstructure
✗Brand "National Institutes of Health (NIH)" mentioned only 1 time(s) — repeat for entity recognitioncitation

Passed Checks (26)

✓771 words in HTML — good content for AI parsingdiscoverability
✓Clean URL structurediscoverability
✓6 semantic HTML5 elements founddiscoverability
✓7 content sections — well-structured for AIdiscoverability
✓64 named entities found — helps AI understand contextdiscoverability
✓62 internal links — good topic cluster signaldiscoverability
✓15 lists found — structured content for AIstructure
✓Concise answer paragraphs after headings — great for AI citationstructure
✓58% short sentences — easy for AI to extractstructure
✓100% concise paragraphs — scannable for AIstructure
✓Avg 128 words/section — sufficient depthstructure
✓Publication/modification date foundcitation
✓Statistics and data found in content — highly citablecitation
✓Source citations found — increases AI trustcitation
✓49 external links — references authoritative sourcescitation
✓Content references 2026/2025 — fresh contentcitation
✓Topic focus: 100% — title keywords found in contentcitation
✓6 answer-box-ready paragraphs found after headingscitation
✓30 conversational words — good for AI summariesvoice
✓Active voice dominant (0% passive) — AI-friendlyvoice
✓Pronoun density: 3.8% — engaging, user-focusedvoice
✓18 H2/H3 headings — good content structure for AIvoice
✓No AI-blocking robots directives — AI crawlers can access contentdiscoverability
✓Freshness signal found (Last-Modified header or dateModified)citation
✓AI crawlers allowed in robots.txt (0/4 explicitly listed)discoverability
✓Brand name consistent across 2/3 signals (title, OG, schema)citation

GEO — 57/100 (25 issues)

Failed Checks (25)

✗Few question headings — add Q&A headings for AI Overviewoverview
✗Content may be too thin for AI Overview (771 words, 4 sections)overview
✗No step-by-step content — add numbered guides for AIoverview
✗40% optimal paragraphs — aim for 20-80 words per paragraphoverview
✗No author schema — add for AI trust signalsauthority
✗Incomplete brand identity — add og:site_name + Organization schemaauthority
✗No original data signals — "our research shows..." boosts AI citationauthority
✗No examples or case studies — add real-world examplesauthority
✗No links to authoritative sources — cite Google, Schema.org, etc.authority
✗No FAQ Schema — add for Google rich results + AI Overviewformat
✗No HowTo Schema — add for step-by-step rich resultsformat
✗No comparison content — add vs. sections for AI recommendationsformat
✗No summary section — add Key Takeaways or TL;DR for AIformat
✗No BreadcrumbList schema — add for better AI contextformat
✗Only one list type — use both <ul> and <ol> for content varietyformat
✗No conclusion — add recommendations or a verdict sectionformat
✗Few data points with units — add specific numbers (e.g., "300+ users")semantic
✗Incomplete Open Graph tags — AI uses these for contexttechnical
✗Only 0 Schema type(s) — add more for AI contexttechnical
✗5 image(s) with generic/short ALT text — use descriptive textformat
✗Only 0 data points — add 5+ statistics for +30-40% AI visibility (Princeton study)authority
✗Author lacks credentials — anonymous content is a GEO penaltyauthority
✗Only 2/6 question types — add What, Why, How headingsoverview
✗No <figure>/<figcaption> — wrap images with descriptive captions for AIformat
✗No authoritative sameAs links — add Wikipedia/Wikidata/LinkedIn URIs to schema for Knowledge Graph alignmentauthority

Passed Checks (33)

✓Definition-style content found — featured snippet candidateoverview
✓Content freshness signals detectedoverview
✓Title and H1 are aligned — clear topic focusoverview
✓2-level heading hierarchy — deep content structureoverview
✓Source citations found — increases AI trustauthority
✓2/5 trust signals foundauthority
✓Expert quotes or testimonials found — authority signalauthority
✓3 industry terms used — domain expertise signalauthority
✓22 unique external domains — diverse sourcesauthority
✓24 images all with ALT text — AI can understand visualsformat
✓Data visualization elements found (tables/charts)format
✓3/6 formatting types used — rich contentformat
✓Multi-perspective content found — balanced analysisformat
✓Actionable advice found — AI prefers practical contentformat
✓1 entity types in Schema — AI can classify contentsemantic
✓7/14 semantic HTML5 elements — deep semantic structuresemantic
✓<time> element found — machine-readable datessemantic
✓100% title keywords in first 200 words — good prominencesemantic
✓52 contextual links — good cross-referencingsemantic
✓Content categorization found — clear topic classificationsemantic
✓3 sections have subtopics (H3) — deep coveragesemantic
✓Mobile-friendly (viewport set)technical
✓HTTPS secure — trusted by AI systemstechnical
✓Page size: 66 KB — reasonabletechnical
✓Canonical URL set — prevents AI from citing duplicatestechnical
✓Page allows AI indexing (no noindex/nosnippet)technical
✓HTML lang="en" set (add og:locale for completeness)technical
✓4 ARIA landmarks found — good accessibility for AItechnical
✓771 words — sufficient depth for AI analysisoverview
✓First 200 words contain topic keywords — AI extracts primarily from the startoverview
✓Definition + list combo — strong featured snippet candidateoverview
✓No snippet restrictions — AI can freely extract content (good)technical
✓Link anchor texts are descriptive — good AI context signalsemantic

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