llms.txt: Google Says Search Ignores It, Yet Uses It Itself
Google's AI search guide says llms.txt isn't needed and Search ignores it, while its own teams use it and a 137K-site study finds 97% go unread.
SEO ·
AI SEO covers how search visibility works when answers are increasingly assembled by large language models instead of presented as a list of links. It spans Google's AI-generated summaries in search results, chatbot assistants that cite web sources, and a growing vocabulary that includes answer engine optimization (AEO) and generative engine optimization (GEO). It also includes the debate over whether any of it differs from traditional SEO.
AI-generated answers now appear on a wide range of queries, including searches for brand names. This changes how clicks, traffic, and attribution reach websites. Search engines also keep tightening spam policies aimed at mass-produced, low-value AI content, which raises the stakes for publishers experimenting with automation. Marketers and publishers are rethinking strategy around three questions: who gets cited, who gets paid, and how much traditional ranking logic carries over into AI answers.
This hub tracks developments such as:
Follow along here if you manage a website, run marketing, or build content strategy and want to know how AI is changing what it takes to be found online.
Google's AI search guide says llms.txt isn't needed and Search ignores it, while its own teams use it and a 137K-site study finds 97% go unread.
SEO ·
A study of 11 sites hit by a Google update found ChatGPT citations fell 27.8%, more than Google AI Mode's 23.8%, while Perplexity dipped just 2.9%.
SEO ·
Google rolled out its fourth spam update of 2026 as AI Overviews cut top-result clicks sharply; here is what the September rollout and new Search Console AI
SEO ·
Google AI Overviews surged from 26% to over 80% of branded queries in late September 2026, while Google now requires manual fact-checking of all AI content.
SEO ·
Martech vendors are flooding the market with AEO and GEO tools, but Google says optimizing for AI search is still SEO — here's what the data and releases show.
SEO ·
AI Overviews now appear on roughly 48% of Google queries and cut organic clicks up to 61%, but cited pages earn 120% more clicks — here's how AI SEO strategy
SEO ·