Generative Engine Optimization (GEO): The Complete 2026 Guide

"Generative Engine Optimization" gets used loosely, but there's a real, testable distinction underneath it: AI crawlers come in two categories, and most sites only think about one of them.

Two categories of AI bot

Training crawlers — GPTBot, ClaudeBot, CCBot, Google-Extended — collect content to train future model versions. Blocking these has no effect on whether you're cited in an answer today; it only affects whether your content shapes some future model.

Retrieval / search crawlers — OAI-SearchBot, Claude-SearchBot, PerplexityBot, ChatGPT-User — fetch pages live, at query time, specifically to answer a user's question right now with a citation. Blocking these is the one mistake that directly kills your chance of being cited in an AI answer today. The two categories use different user-agent strings and must be handled as separate rules in robots.txt — a blanket "block all AI bots" line usually blocks both by accident.

What about llms.txt?

Skip it as a priority. As of August 2026, no major AI lab — not OpenAI, not Anthropic, not Google — has adopted the proposed llms.txt convention for retrieval. Google's own Search Relations team has stated they have no plans to support it, and large-scale studies (one across roughly 300,000 domains) have found no measurable correlation between having an llms.txt file and AI citation rates. It's cheap and harmless to keep one, but it isn't a lever.

What actually moves the needle

1. Allow retrieval/search bots explicitly in robots.txt (see our crawler guide).
2. Structured data that accurately describes what's on the page — Organization, Product, FAQPage, Article.
3. Content an assistant can actually parse and quote cleanly: clear headings, direct answers near the top, no critical information trapped behind JavaScript rendering the crawler may not execute.
4. Genuine citability — a real fact, number, or answer worth quoting, not a marketing paragraph.

Check whether your own site is readable by these bots and whether assistants currently mention your business at areyoufindable.com.