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 ·
Search engine optimization for Google is the practice of making websites discoverable, understandable, and trustworthy to the world's most widely used search engine. For years that meant crawlability, relevant content, quality links, and fast, mobile-friendly pages. Those fundamentals still matter, but the ground beneath them is moving quickly.
Generative AI is reshaping how people find information. AI-generated summaries now appear above traditional results for many queries, including searches for brand names. That changes whether users click through to websites at all. AI chatbots and answer engines also cite sources in ways that often echo Google's own rankings, so visibility in classic search can ripple outward.
Google continues to roll out core and spam updates, with recent attention on low-quality, mass-produced AI content. New vocabulary has emerged alongside these shifts, including answer engine optimization (AEO) and generative engine optimization (GEO), and new tools promise ways to win in AI search. Google, for its part, maintains that good SEO remains the foundation.
This hub tracks developments across the field, including:
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 ·