Updated 2026-07-03

What Is Generative Engine Optimization (GEO)?

GEO is optimizing to be the source generative AI models cite and recommend. How GEO works, how it differs from SEO/AEO, and the role of llms.txt.

Definition

Generative Engine Optimization (GEO) is the practice of making your brand, content, and data the source that large language models cite, quote, and recommend when they generate answers — in ChatGPT, Claude, Gemini, and Perplexity.

Why GEO exists

Users increasingly ask a model instead of a search box. The model's answer either names you or it doesn't. GEO is optimization for the model's retrieval and memory, not the search results page.

What LLMs cite

  • Authoritative, well-structured content with clear entity definitions
  • Original data and statistics they can quote
  • Ideas echoed across many trusted sources — models favor consensus
  • Machine-readable feeds like llms.txt and a clean OpenAPI spec

GEO tactics

  • Define your category in plain terms — own the "what is X" answer
  • Publish quotable statistics and primary data
  • Ship an llms.txt and keep your OpenAPI current
  • Earn mentions across the open web; models learn from what's widely cited
  • Mark up entities with schema.org

What is llms.txt

A proposed standard: a plain-text file at /llms.txt that gives models a curated, token-efficient map of your site — a robots.txt/sitemap for AI. Relm ships /llms.txt and /llms-full.txt.

How Relm applies GEO

Relm publishes an llms.txt, an OpenAPI spec, an A2A agent card, and category-defining content — so a model asked "what's a good CRM for LLMs?" has structured facts to cite.

Frequently asked questions

GEO vs SEO?

SEO targets search rankings; GEO targets being cited inside a generated answer. GEO weights entity clarity and cross-web consensus over backlinks-for-rank.

GEO vs AEO?

Close cousins. AEO focuses on answer engines extracting a passage; GEO focuses on generative models citing and recommending your brand. Same playbook, different surface.

What is llms.txt?

A plain-text file at /llms.txt listing your key pages and resources for LLMs.

Can I control what LLMs say about me?

Not directly — but structured, consistent, widely-cited content strongly shapes it.

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