Sources
Every document we quoted, grouped by who published it. The number is how many answers on this site come from it.
first party112
The operator of the thing being described, or the body that defines it.
- Google's Guide to Optimizing for Generative AI Features on Google Search | Google Search Central | Documentation | Google for Developersdevelopers.google.com48
- AI Features and Your Website | Google Search Central | Documentation | Google for Developersdevelopers.google.com32
- https://developers.google.com/search/updatesdevelopers.google.com31
- https://developers.google.com/search/blog/2024/03/core-update-spam-policiesdevelopers.google.com28
- Spam Policies for Google Web Search | Google Search Central | Documentation | Google for Developersdevelopers.google.com28
- https://web.dev/articles/defining-core-web-vitals-thresholdsweb.dev27
- Largest Contentful Paint (LCP) | Articles | web.devweb.dev25
- https://developers.google.com/search/docs/appearance/page-experiencedevelopers.google.com23
- How to Specify a Canonical with rel="canonical" and Other Methods | Google Search Central | Documentation | Google for Developersdevelopers.google.com20
- Interaction to Next Paint (INP) | web.devweb.dev20
- https://developers.google.com/crawling/docs/crawl-budgetdevelopers.google.com18
- https://developer.chrome.com/docs/crux/methodologydeveloper.chrome.com17
- https://developers.google.com/search/blog/2024/11/site-reputation-abusedevelopers.google.com17
- https://developers.google.com/search/docs/crawling-indexing/robots-meta-tagdevelopers.google.com17
- Understand JavaScript SEO Basics | Google Search Central | Documentation | Google for Developersdevelopers.google.com16
- https://webaim.org/projects/million/webaim.org16
- https://developer.chrome.com/docs/lighthouse/agentic-browsing/llms-txtdeveloper.chrome.com15
- Latest Google Search Documentation Updates | Google Search Central | What's new | Google for Developersdevelopers.google.com15
- Introducing AI Performance in Bing Webmaster Tools Public Previewblogs.bing.com14
- https://developers.google.com/crawling/docs/myths-about-crawlingdevelopers.google.com14
- https://developers.google.com/search/updates/core-updatesdevelopers.google.com14
- https://blog.google/products-and-platforms/products/search/google-search-update-march-2024/blog.google13
- https://commoncrawl.org/faqcommoncrawl.org13
- https://developers.google.com/search/blog/2026/06/gen-ai-performance-reportsdevelopers.google.com13
- https://developers.google.com/search/docs/appearance/structured-data/intro-structured-datadevelopers.google.com12
- Crawl Budget Management | Google Crawling Infrastructure | Crawling infrastructure | Google for Developersdevelopers.google.com12
- https://www.sitemaps.org/protocol.htmlsitemaps.org12
- Web Vitals | Articles | web.devweb.dev12
- https://developers.google.com/search/blog/2023/06/sitemaps-lastmod-pingdevelopers.google.com11
- How to Write Meta Descriptions | Google Search Central | Documentation | Google for Developersdevelopers.google.com11
- https://support.google.com/webmasters/answer/16908024?hl=ensupport.google.com11
- https://commoncrawl.org/blog/introducing-the-ai-visibility-auditcommoncrawl.org10
- https://developers.google.com/search/blog/2023/08/howto-faq-changesdevelopers.google.com10
- Image SEO Best Practices | Google Search Central | Documentation | Google for Developersdevelopers.google.com10
- https://www.indexnow.org/documentationindexnow.org10
- Cumulative Layout Shift (CLS) | Articles | web.devweb.dev10
- https://developer.chrome.com/docs/lighthouse/performance/performance-scoringdeveloper.chrome.com9
- https://developers.google.com/search/blog/2022/08/helpful-content-updatedevelopers.google.com9
- Block Search Indexing with noindex | Google Search Central | Documentation | Google for Developersdevelopers.google.com9
- https://support.google.com/webmasters/answer/16984139?hl=ensupport.google.com9
- https://blog.google/products/search/ai-mode-search/blog.google8
- Creating Helpful, Reliable, People-First Content | Google Search Central | Documentation | Google for Developersdevelopers.google.com8
- https://developers.google.com/search/docs/specialty/international/localized-versionsdevelopers.google.com8
- https://www.pewresearch.org/short-reads/2025/07/22/google-users-are-less-likely-to-click-on-links-when-an-ai-summary-appears-in-the-results/pewresearch.org8
- https://web.dev/blog/inp-cwv-launchweb.dev8
- Keeping Content Discoverable with Sitemaps in AI Powered Searchblogs.bing.com7
- Bing Introduces Support for the data-nosnippet HTML Attributeblogs.bing.com7
- https://developer.chrome.com/docs/crux/apideveloper.chrome.com7
- https://developers.google.com/search/blog/2017/01/what-crawl-budget-means-for-googlebotdevelopers.google.com7
- https://developers.google.com/search/blog/2019/07/a-note-on-unsupported-rules-in-robotstxtdevelopers.google.com7
- Google Search's guidance about AI-generated content | Google Search Central Blog | Google for Developersdevelopers.google.com7
- https://developers.google.com/search/docs/crawling-indexing/canonicalizationdevelopers.google.com7
- Google's common crawlers | Google Crawling Infrastructure | Crawling infrastructure | Google for Developersdevelopers.google.com7
- Robots.txt Introduction and Guide | Google Search Central | Documentation | Google for Developersdevelopers.google.com7
- https://llmstxt.org/changes.htmlllmstxt.org7
- https://web.dev/blog/evolving-clsweb.dev7
- https://blog.google/products/admanager/the-need-for-mobile-speed/blog.google6
- https://developers.google.com/search/docs/appearance/ranking-systems-guidedevelopers.google.com6
- Build and Submit a Sitemap | Google Search Central | Documentation | Google for Developersdevelopers.google.com6
- Google Search's Guidance on Generative AI Content on Your Website | Google Search Central | Documentation | Google for Developersdevelopers.google.com6
- https://patents.google.com/patent/US8682892B1/enpatents.google.com6
- https://support.google.com/webmasters/answer/2648487?hl=ensupport.google.com6
- https://ar5iv.labs.arxiv.org/html/2005.14165ar5iv.labs.arxiv.org5
- How to add IndexNow to your website | Bing Webmaster Toolsbing.com5
- Why IndexNow | Bing Webmaster Toolsbing.com5
- Supercharge Your Search Performance with Bing Webmaster Toolsblogs.bing.com5
- https://developer.chrome.com/blog/lighthouse-10-0developer.chrome.com5
- https://developer.chrome.com/docs/lighthouse/agentic-browsing/scoringdeveloper.chrome.com5
- https://developers.google.com/search/blog/2019/07/rep-iddevelopers.google.com5
- https://digital-markets-act.ec.europa.eu/commission-opens-investigation-potential-digital-markets-act-breach-google-demoting-media-publishers-2025-11-13_endigital-markets-act.ec.europa.eu5
- https://static.googleusercontent.com/media/guidelines.raterhub.com/en//searchqualityevaluatorguidelines.pdfstatic.googleusercontent.com5
- https://arxiv.org/abs/2311.09735arxiv.org4
- Start Using Bing Webmaster Tools to Improve Your Site Visibilityblogs.bing.com4
- https://blogs.bing.com/webmaster/january-2019/bingbot-Series-Get-your-content-indexed-fast-by-now-submitting-up-to-10,000-URLs-per-day-to-Bingblogs.bing.com4
- https://commoncrawl.org/blog/july-2026-crawl-archive-now-availablecommoncrawl.org4
- https://llmstxt.org/llmstxt.org4
- https://blog.google/technology/ai/an-update-on-web-publisher-controls/blog.google3
- Access to Instant Indexing: Bing URL submission API | Bing...blogs.bing.com3
- https://developer.chrome.com/docs/crux/history-apideveloper.chrome.com3
- https://developer.chrome.com/docs/lighthouse/overviewdeveloper.chrome.com3
- https://developers.google.com/search/blog/2022/12/google-raters-guidelines-e-e-a-tdevelopers.google.com3
- Structured Data Markup that Google Search Supports | Google Search Central | Documentation | Google for Developersdevelopers.google.com3
- https://developers.google.com/search/docs/crawling-indexing/javascript/dynamic-renderingdevelopers.google.com3
- https://status.search.google.com/incidents/DsirqJ1gpPRgVQeccPRvstatus.search.google.com3
- https://status.search.google.com/incidents/wdAXJk6LRRihEjpzEeWEstatus.search.google.com3
- https://support.google.com/webmasters/answer/12474899?hl=ensupport.google.com3
- https://support.google.com/webmasters/answer/16983858?hl=ensupport.google.com3
- https://web.dev/case-studies/milliseconds-make-millionsweb.dev3
- https://yandex.com/support/webmaster/en/controlling-robot/sitemap.htmlyandex.com3
- https://blog.google/innovation-and-ai/products/an-update-on-web-publisher-controls/blog.google2
- https://blog.google/products-and-platforms/products/search/new-controls-website-owners/blog.google2
- Does Duplicate Content Hurt SEO and AI Search Visibility?blogs.bing.com2
- https://blogs.bing.com/webmaster/august-2022/IndexNow-adoption-gains-momentumblogs.bing.com2
- https://commoncrawl.org/blogcommoncrawl.org2
- https://developer.chrome.com/docs/cruxdeveloper.chrome.com2
- https://developers.google.com/crawling/docs/changelogdevelopers.google.com2
- Google Search Essentials (formerly Webmaster Guidelines) | Google Search Central | Documentation | Google for Developersdevelopers.google.com2
- https://www.google.com/search/howsearchworks/how-search-works/ranking-results/google.com2
- https://www.rfc-editor.org/rfc/rfc9309.txtrfc-editor.org2
- https://schema.org/FAQPageschema.org2
- IndexNow Drives Smarter and Faster Content Discoveryblogs.bing.com1
- https://chromium.googlesource.com/chromium/src/+/main/docs/speed/metrics_changelog/cls.mdchromium.googlesource.com1
- https://developer.chrome.com/docs/crux/bigquerydeveloper.chrome.com1
- https://developers.google.com/search/blog/2009/09/google-does-not-use-keywords-meta-tagdevelopers.google.com1
- https://developers.google.com/search/docs/appearance/core-web-vitalsdevelopers.google.com1
- https://developers.google.com/search/docs/fundamentals/seo-starter-guidedevelopers.google.com1
- https://support.google.com/webmasters/answer/9044175?hl=ensupport.google.com1
- IndexNow Enables Faster and More Reliable Updates for Shopping and Adsblogs.bing.com
- Influencing Title Links in Google Search | Google Search Central | Documentation | Google for Developersdevelopers.google.com
- Google Crawler (User Agent) Overview | Google Crawling Infrastructure | Crawling infrastructure | Google for Developersdevelopers.google.com
- History for Ranking | Google Search Status Dashboarddevelopers.google.com
- Overview of CrUX | Chrome UX Report | Chrome for Developersweb.dev
trade press37
A publication reporting on the field.
- https://www.searchenginejournal.com/97-of-llms-txt-files-got-no-requests-ahrefs-data-shows/579478/searchenginejournal.com29
- How Cats.txt Showed LLMs.txt Evidence Is GEO Astrologysearchenginejournal.com18
- Common Crawl Published A Manual For Being Visible To AI, I Automated It via @sejournal, @suganthansearchenginejournal.com16
- https://www.searchenginejournal.com/google-strengthens-policy-against-site-reputation-abuse/533018/searchenginejournal.com13
- Why the traditional link building model no longer works for AI searchsearchengineland.com12
- https://www.searchenginejournal.com/google-seo-brand-mentions/430848/searchenginejournal.com10
- https://www.searchenginejournal.com/googles-llms-txt-guidance-depends-on-which-product-you-ask/575431/searchenginejournal.com6
- https://searchengineland.com/links-google-search-ranking-factor-gary-illyes-432422searchengineland.com6
- https://www.seroundtable.com/google-digital-public-relations-link-building-30810.htmlseroundtable.com6
- Google Home Page Create Images, Ask About Files & Brainstorm Buttonsseroundtable.com6
- https://www.searchenginejournal.com/google-march-2024-core-update/510243/searchenginejournal.com4
- https://www.searchenginejournal.com/what-opting-out-of-googles-ai-search-features-means-now/584321/searchenginejournal.com4
- https://www.seroundtable.com/google-expired-repurposed-domains-seo-flotsam-34550.htmlseroundtable.com4
- https://www.seroundtable.com/google-long-term-noindex-follow-24990.htmlseroundtable.com4
- https://www.seroundtable.com/google-priority-change-frequency-xml-sitemap-20273.htmlseroundtable.com4
- https://www.seroundtable.com/google-very-few-links-needed-rank-pages-37267.htmlseroundtable.com4
- https://www.searchenginejournal.com/ranking-factors/alt-text/searchenginejournal.com3
- https://www.seroundtable.com/google-ai-llms-txt-39607.htmlseroundtable.com3
- https://www.seroundtable.com/google-helpful-content-recovery-core-update-37095.htmlseroundtable.com3
- https://www.seroundtable.com/google-hreflang-complex-seo-25261.htmlseroundtable.com3
- https://www.seroundtable.com/interview-google-august-core-update-38024.htmlseroundtable.com3
- https://www.searchenginejournal.com/do-google-lighthouse-scores-affect-seo/425347/searchenginejournal.com2
- https://www.searchenginejournal.com/google-reports-ai-search-impressions-how-to-read-them/582824/searchenginejournal.com2
- https://www.searchenginejournal.com/google-will-be-testing-indexnow/426602/searchenginejournal.com2
- https://www.searchenginejournal.com/ranking-factors/meta-descriptions/searchenginejournal.com2
- Study: ChatGPT ads appear on 26% of commercial promptssearchengineland.com2
- Google: Hreflang URLs Not Indexed In The Proper Senseseroundtable.com2
- https://www.seroundtable.com/google-link-schemes-update-17144.htmlseroundtable.com2
- https://www.seroundtable.com/google-no-eat-scoreimportant-indirectly-ranking-algorithm-32961.htmlseroundtable.com2
- https://www.searchenginejournal.com/googles-gary-illyes-lastmod-signal-is-binary/519239/searchenginejournal.com1
- https://www.seroundtable.com/google-lastmod-dates-incorrect-41697.htmlseroundtable.com1
- The AEO Playbook: How to Get Cited & Stay Visible via @sejournal, @hethr_campbellsearchenginejournal.com
- Gen Z Now Treats Claude And OpenAI Like Consumer Brands, But Trust Is Still An Issue via @sejournal, @gregjarboesearchenginejournal.com
- The Trust Signals That Get Your Brand Cited By AI Overviews, Just Like Freshpet [Webinar] via @sejournal, @hethr_campbellsearchenginejournal.com
- Google brings new AI agent capabilities to Ads and Analyticssearchengineland.com
- Google confirms testing new buttons on home page to drive users to AI-powered search featuressearchengineland.com
- Technical SEO testing: How to build a stronger experimentsearchengineland.com
vendor23
A company selling something in the field it is describing.
- https://vercel.com/blog/how-google-handles-javascript-throughout-the-indexing-processvercel.com19
- https://www.semrush.com/blog/google-ai-mode-seo-impact/semrush.com15
- Google Doesn’t Punish AI Content; It Punishes Bad Content (331k Pages Studied)ahrefs.com13
- https://vercel.com/blog/the-rise-of-the-ai-crawlervercel.com11
- https://www.similarweb.com/blog/insights/ai-news/ai-visibility-downstream-impact/similarweb.com10
- https://ahrefs.com/blog/hreflang-studyahrefs.com8
- New Research from Similarweb: How AI Brand Mentions Influence Direct Visits & Traditional Search Queriessparktoro.com8
- https://ahrefs.com/blog/ai-overview-brand-correlation/ahrefs.com7
- https://ahrefs.com/blog/meta-description-study/ahrefs.com7
- https://ahrefs.com/blog/ai-generated-content-does-not-hurt-your-google-rankings/ahrefs.com6
- https://ahrefs.com/blog/ai-overviews-reduce-clicks/ahrefs.com6
- https://ahrefs.com/blog/ai-overviews-reduce-clicks-update/ahrefs.com5
- https://yoast.com/meta-descriptions/yoast.com5
- https://backlinko.com/search-engine-rankingbacklinko.com4
- https://blog.cloudflare.com/content-independence-day-no-ai-crawl-without-compensation/blog.cloudflare.com3
- https://www.semrush.com/blog/the-most-common-hreflang-mistakes-infographic/semrush.com3
- https://ahrefs.com/blog/what-percentage-of-new-content-is-ai-generatedahrefs.com2
- https://backlinko.com/hub/seo/crawl-budgetbacklinko.com2
- 7 Reasons Every Marketing Team Should Monitor Brand Mentionssparktoro.com1
- 10 Creative Ways to Write with AI (Without Losing Your Soul)ahrefs.com
- Free LLMs.txt Generatorahrefs.com
- 6 Ways to Automate AEO With Letaidoahrefs.com
- Retrieval-Augmented Generation (RAG) Explained: How AI Decides Which Pages to Search & Citeahrefs.com
other53
Anything else, including personal sites and archives.
- https://www.reporteroutreach.com/blog/digital-pr-statisticsreporteroutreach.com13
- https://portent.com/blog/seo/how-often-google-ignores-our-meta-descriptions.htmportent.com11
- https://www.corewebvitals.io/pagespeed/the-crux-28-day-delay-mythcorewebvitals.io9
- https://georion.app/blog/faq-schema-for-ai-answers-2026-still-worth-it-after-googles-may-updategeorion.app9
- https://almanac.httparchive.org/en/2025/performancealmanac.httparchive.org8
- https://www.contentpowered.com/blog/xml-sitemap-priority-changefreq/contentpowered.com8
- https://www.maximuslabs.ai/generative-engine-optimization/geo-experimental-techniquesmaximuslabs.ai8
- https://thestacc.com/blog/helpful-content-update-recovery/thestacc.com8
- https://slickplan.com/blog/xml-sitemap-priority-changefreqslickplan.com7
- https://assets.mofoprod.net/network/documents/Common_Crawl_Mozilla_Foundation_2024.pdfassets.mofoprod.net5
- https://raw.githubusercontent.com/chromium/chromium/main/docs/speed/metrics_changelog/2020_05_lcp.mdraw.githubusercontent.com5
- https://raw.githubusercontent.com/chromium/chromium/main/docs/speed/metrics_changelog/2023_08_lcp.mdraw.githubusercontent.com5
- https://web.archive.org/web/20220601000000/https://developers.google.com/search/updates/core-updatesweb.archive.org5
- https://www.accessibilitychecker.org/blog/alt-text-for-seo/accessibilitychecker.org4
- https://www.amsive.com/insights/seo/google-march-2026-core-update-winners-losers-analysis/amsive.com4
- https://www.companionlink.com/blog/2026/07/best-sites-to-buy-aged-expired-domains-for-seo-in-2026-marketplaces-auctions-tools/companionlink.com4
- https://raw.githubusercontent.com/chromium/chromium/main/docs/speed/metrics_changelog/2023_04_lcp.mdraw.githubusercontent.com4
- https://raw.githubusercontent.com/chromium/chromium/main/docs/speed/metrics_changelog/2024_10_lcp.mdraw.githubusercontent.com4
- https://www.seoclarity.net/blog/faq-schema-ctr-testseoclarity.net4
- https://twosquares.co.uk/blog/crawl-budgetstwosquares.co.uk4
- https://weblumino.com/introducing-search-generative-ai-performance-reports-in-search-console-2026/weblumino.com4
- https://ziptie.dev/blog/eeat-for-ai-search/ziptie.dev4
- https://khalidseo.com/google-site-reputation-abuse-guide/khalidseo.com3
- https://neilpatel.com/blog/gsc-ai-search-data-generative-ai-report/neilpatel.com3
- https://www.sixthcitymarketing.com/2023/12/20/schema-markup-statistics-facts/sixthcitymarketing.com3
- https://bsky.app/profile/methode.bsky.social/post/3mqqrdfwyu22hbsky.app2
- https://www.clickrank.ai/canonical-tags/clickrank.ai2
- https://faqjsonld.com/blog/google-faq-deprecation-2026/faqjsonld.com2
- https://futurism.com/the-byte/experts-90-online-content-ai-generatedfuturism.com2
- https://www.greadme.com/blog/seo/how-to-use-canonical-tags-properly-complete-guidegreadme.com2
- https://www.intrepidonline.com/blog/seo/sge-google-block-not-block/intrepidonline.com2
- https://parachutedesign.ca/blog/largest-contentful-paint/parachutedesign.ca2
- https://raw.githubusercontent.com/chromium/chromium/main/docs/speed/metrics_changelog/2020_11_lcp.mdraw.githubusercontent.com2
- https://raw.githubusercontent.com/chromium/chromium/main/docs/speed/metrics_changelog/lcp.mdraw.githubusercontent.com2
- https://www.reporteroutreach.com/blog/state-of-link-buildingreporteroutreach.com2
- https://seobeni.com/blog/core-web-vitals-rankings/seobeni.com2
- https://seoscore.tools/blog/image-seo/seoscore.tools2
- https://srutatech.com/2026/02/10/why-e-e-a-t-is-still-the-most-important-ranking-factor-in-2026/srutatech.com2
- https://thestacc.com/blog/ai-content-statistics/thestacc.com2
- https://thestacc.com/blog/canonical-tags-guide/thestacc.com2
- https://web.archive.org/web/20131110134247/https://support.google.com/webmasters/answer/183668web.archive.org2
- https://web.archive.org/web/20201112022544/https://developers.google.com/search/docs/advanced/sitemaps/build-sitemapweb.archive.org2
- https://web.archive.org/web/20240916053734/https://developers.google.com/search/docs/crawling-indexing/google-common-crawlersweb.archive.org2
- https://zerokit.dev/guides/block-google-extended.htmlzerokit.dev2
- https://www.amicited.com/blog/google-extended-what-it-does-should-you-block-it/amicited.com1
- https://www.corgenx.com/blog/core-web-vitals-impact-search-rankingscorgenx.com1
- https://www.digitalapplied.com/blog/google-search-console-ai-performance-block-ai-responses-2026-decisiondigitalapplied.com1
- https://gracker.ai/seo-101/hreflang-implementation-challenges-solutionsgracker.ai1
- https://nitropack.io/blog/fix-largest-contentful-paint/nitropack.io1
- https://www.playwire.com/blog/how-to-block-ai-bots-with-robotstxt-the-complete-publishers-guideplaywire.com1
- https://raw.githubusercontent.com/chromium/chromium/main/docs/speed/metrics_changelog/2021_09_lcp.mdraw.githubusercontent.com1
- https://web.archive.org/web/20150317165015/https://support.google.com/webmasters/answer/183668web.archive.org1
- https://websitespeedy.com/blog/why-53-of-mobile-users-abandon-sites-that-take-over-3-seconds-to-load/websitespeedy.com1