Sources
From AEO.wiki, the Answer Engine Optimization reference · Published · Updated · By the AEO.wiki editorial team
AEO.wiki cites vendor documentation first, then peer-reviewed research and dated independent studies, and labels practitioner advice as practice. All were accessed on September 28–30 and October 29, 2026; publication dates appear where each source is cited.
108 sources. See the editorial policy for how sources are chosen and research for study summaries.
Google (Search Central unless noted in the title)
- Google Assistant shutting down on Android, Wear OS in September · 9to5Google
- Grounding with Google Search (Gemini API) · Google AI for Developers
- Google I/O 2025: Sundar Pichai’s opening keynote · Google (The Keyword)
- An expanded partnership with Reddit · Google (The Keyword)
- AI Mode in Google Search: Updates from Google I/O 2025 · Google (The Keyword)
- Introducing the Knowledge Graph: things, not strings (Amit Singhal) · Google (The Keyword)
- A reintroduction to Google’s featured snippets (Danny Sullivan) · Google (The Keyword)
- Our latest update to the quality rater guidelines: E-A-T gets an extra E for Experience
- Changes to HowTo and FAQ rich results
- Top ways to ensure your content performs well in Google’s AI experiences on Search
- AI features and your website
- Google image SEO best practices
- Understanding page experience in Google Search results
- Preferred sources
- Influencing your byline dates in Google Search
- Control your snippets in search results
- Article structured data
- Introduction to structured data markup in Google Search
- Local business structured data
- Organization structured data
- Product structured data
- ProfilePage structured data
- General structured data guidelines
- Structured data markup that Google Search supports
- Speakable (Article, WebPage) structured data (BETA)
- Video SEO best practices
- Block Search indexing with noindex · Google Search Central
- Google’s common crawlers (including Google-Extended)
- Understand JavaScript SEO basics
- Robots meta tag, data-nosnippet, and X-Robots-Tag specifications
- Create and submit a robots.txt file · Google Crawling Infrastructure
- Introduction to robots.txt
- Build and submit a sitemap
- Spam policies for Google web search
- Optimizing your website for generative AI features on Google Search
- Creating helpful, reliable, people-first content
- Guidance on third-party SEO tools, services, and advice
- Google Search’s guidance on using generative AI content on your website
- Latest Google Search documentation updates (changelog)
- Search Quality Rater Guidelines (PDF) · Google
- Custom channel groups (includes an “AI assistants” example) · Google Analytics Help
- Guidelines for representing your business on Google · Google Business Profile Help
- Tips to improve your local ranking on Google · Google Business Profile Help
- Maps user-generated content policy: fake engagement · Google Maps Help
- Learn about Gemini for Home voice assistant · Google Home and Nest Help
- Search generative AI control · Search Console Help
- Generative AI performance report (Search) · Search Console Help
- Page indexing report · Search Console Help
- Build agent-friendly websites · web.dev (Google Chrome team)
- Web Vitals · web.dev (Google Chrome team)
- Featured snippets and your website · Google Search Central
Microsoft and Bing
- Introducing AI Performance in Bing Webmaster Tools Public Preview · Bing Webmaster Blog
- IndexNow protocol · IndexNow.org
- AI Performance (help documentation) · Microsoft Bing Webmaster Tools
- Bing Webmaster Guidelines · Microsoft Bing Webmaster Tools
- Which Crawlers Does Bing Use? · Microsoft Bing Webmaster Tools
OpenAI, Anthropic, Perplexity and other AI companies
- About Amazonbot (Amazonbot, Amzn-SearchBot, Amzn-User) · Amazon Developer
- Introducing Alexa+, the next generation of Alexa · Amazon
- Does Anthropic crawl data from the web, and how can site owners block the crawler? · Anthropic (Claude Help Center)
- Apple Intelligence now features Image Playground, Genmoji, Writing Tools enhancements, seamless support for ChatGPT, and visual intelligence · Apple Newsroom
- About Applebot (including Applebot-Extended) · Apple Support
- OpenAI launches ChatGPT search, competing with Google and Microsoft · CNBC
- Web search tool · Claude Platform documentation
- Content Independence Day: no AI crawl without compensation! · Cloudflare Blog
- CCBot · Common Crawl
- Meta Web Crawlers · Meta for Developers
- Publishers and Developers – FAQ · OpenAI Help Center
- Searching the web with ChatGPT · OpenAI Help Center
- Overview of OpenAI Crawlers · OpenAI Platform documentation
- What is Perplexity? · Perplexity Help Center
- Perplexity Crawlers · Perplexity documentation
- Anthropic appears to be using Brave to power web search for its Claude chatbot · TechCrunch
- The rise of the AI crawler · Vercel (with MERJ)
- The /llms.txt file (proposal by Jeremy Howard) · llmstxt.org
Research and studies
- The Impact of Google AI Overviews on Publisher Traffic and User Experience: Evidence from a Field Experiment (Agarwal and Sen) · SSRN working paper (Indian School of Business; Carnegie Mellon University)
- AI in Search Reduces Publisher Referrals Without Improving User Experience: Experimental Evidence (Wang, Gleason, Bart, Wilson, Metaxa) · arXiv preprint (University of Pennsylvania; Northeastern University)
- Update: 38% of AI Overview Citations Pull From The Top 10 (Louise Linehan) · Ahrefs
- AIO Impact on Google CTR: 2026 Update (McDonald, Cooley, Williams) · Seer Interactive
- AI Overviews Cut CTR by 23.1% in France (Juliette Begue) · Ahrefs
- Impact of AI Search Summaries on Website Traffic: Evidence from Google AI Overviews and Wikipedia (Khosravi and Yoganarasimhan) · arXiv working paper (University of Washington)
- Americans and AI 2026: Chatbots, Smart Devices and Views on Impact · Pew Research Center
- Emerging uses of AI chatbots for news and what it means for journalism (Amy Ross Arguedas), Digital News Report 2026 · Reuters Institute for the Study of Journalism
- News Integrity in AI Assistants · European Broadcasting Union (EBU) and BBC
- Think Before Writing: Feature-Level Multi-Objective Optimization for Generative Citation Visibility (Liu and Xu) · Proceedings of ACL 2026 (Long Papers), ACL Anthology
- NEW Research: AIs are highly inconsistent when recommending brands or products; marketers should take care when tracking AI visibility (Rand Fishkin, with Patrick O’Donnell of Gumshoe) · SparkToro
- We Analyzed 137K Sites: 97% of llms.txt Files Never Get Read (Louise Linehan) · Ahrefs
- Answer Bubbles: Information Exposure in AI-Mediated Search (Huang, Goyal, Saha, Chandrasekharan) · arXiv preprint
- The Impact of AI Search on the Online Content Ecosystem: Evidence from Google and Reddit (Zhang, Cui, Zhang) · arXiv preprint
- 76% of AI Overview Citations Pull From the Top 10 · Ahrefs
- AI Overviews Reduce Clicks by 34.5% · Ahrefs
- AI brand visibility correlations (75,000 brands) · Ahrefs
- Update: AI Overviews Reduce Clicks by 58% · Ahrefs
- AI Search Has a Citation Problem (Jaźwińska and Chandrasekar) · Columbia Journalism Review, Tow Center for Digital Journalism
- Google users are less likely to click on links when an AI summary appears in the results · Pew Research Center
- Ranking Manipulation for Conversational Search Engines (Pfrommer, Bai, Gautam, Sojoudi) · Proceedings of EMNLP 2024, ACL Anthology
- GEO: Generative Engine Optimization (arXiv:2311.09735; Aggarwal, Murahari, Rajpurohit, Kalyan, Narasimhan, Deshpande) · arXiv / KDD 2024
- 2024 Zero-Click Search Study: For every 1,000 EU Google Searches, only 374 clicks go to the Open Web. In the US, it’s 360. · SparkToro
- ChatGPT drop in UTM tracking was a bug · Search Engine Land
Standards, reference and regulators
- RFC 9309: Robots Exclusion Protocol · IETF (RFC Editor)
- DefinedTerm and DefinedTermSet · Schema.org
- FAQPage type · Schema.org
- HowTo type · Schema.org
- Schema.org vocabulary · Schema.org
- sameAs property · Schema.org
- Federal Trade Commission announces final rule banning fake reviews and testimonials · U.S. Federal Trade Commission
- Wikidata: Introduction · Wikidata (Wikimedia Foundation)
- Wikipedia: Conflict of interest · Wikipedia
- Wikipedia: Notability · Wikipedia