In search marketing, GEO stands for generative engine optimization — the practice of getting your content used, cited and named in answers written by AI systems like ChatGPT, Perplexity, Gemini and Google's AI Overviews. Where SEO aims to rank a page, GEO aims to have the answer itself draw on you. (If you were looking for geography, geocoding or geo-targeted ads, those are different fields that share the same three letters.)
What does GEO stand for?
GEO is short for generative engine optimization. A "generative engine" is any system that answers a question by writing a response rather than returning a list of links — ChatGPT, Perplexity, Gemini, Claude, and the AI Overviews that now sit above many Google results. The term was popularised by a 2023 academic paper and has since become the most common label for the discipline.
You'll also see it called LLMO, AISO, or AI SEO. They describe substantially the same work. Our acronym guide untangles which labels are synonyms and which aren't.
How is GEO different from SEO?
SEO optimizes for a ranked list. Success is a position: first, third, tenth. The searcher then chooses.
GEO optimizes for a composed answer. The engine reads several sources, decides what's true and useful, and writes a reply that may quote you, cite you, name you — or do none of those. There's no position ten in a paragraph. You are either part of the answer or you aren't.
The foundations overlap heavily. A site that's fast, crawlable, well-structured and genuinely useful tends to do well in both. What GEO adds is attention to how a machine extracts and reuses your words: direct answers near the top of a page, clear facts, consistent details, and nothing that stops an AI crawler reading the page at all.
Why does GEO matter now?
Because the answer is moving up the page. When an AI Overview resolves a question on the results page, or an assistant names two businesses in a sentence, the click that SEO was built to win may never happen. Being ranked beneath an answer that doesn't mention you is a much weaker position than it used to be.
For businesses that depend on being chosen — a dentist, a law firm, a roofer — the practical question has shifted from "do we rank?" to "when someone asks an assistant who to call, are we named?" If that's your business, GEO for local businesses covers when it's worth the effort and when it isn't.
What does GEO look like in practice?
Take a family law firm in a mid-sized city. Under an SEO-only view, the goal is to rank for "divorce lawyer" plus the city name. Under GEO, the question becomes: when someone asks an assistant "who's a good divorce lawyer here who handles custody," is the firm named — and is its site one of the sources the answer draws on?
The work that moves that is concrete. The firm's practice-area pages state plainly which matters it handles and where. Its attorneys are named with their credentials. Its details match across its site, its Business Profile and the legal directories that list it. And none of it is locked behind a crawler block or a script that hides the text. Each of those makes the firm easier for a generative engine to find, trust and quote.
Common misunderstandings about GEO
"It's a trick for gaming AI." The practices that work are mostly the unglamorous ones — clarity, accuracy, consistency, access. There's no reliable shortcut, and tactics aimed at manipulating AI systems tend to be short-lived.
"It replaces SEO." It doesn't. Many generative engines search the web to answer, so a page that can't be found through search is at a disadvantage in GEO too.
"You can see your GEO ranking." There isn't one. Answers vary from run to run, which is why GEO is measured as a rate over repeated checks rather than a fixed position.
What does GEO actually involve?
Most of it is work you can start today:
- Crawler access. Make sure AI crawlers such as GPTBot, ClaudeBot and PerplexityBot can fetch your pages. Firewalls and CDN bot settings block them surprisingly often. See our field guide to AI crawlers.
- Readable content. Key information should be in the HTML, not rendered only by JavaScript that a crawler may not run.
- Answer-first writing. Lead each page with the direct answer to the question it exists to answer. More on answer-shaped content.
- Entity clarity. Structured data and consistent details, so an engine is certain who you are.
- Corroboration. Mentions, reviews and listings elsewhere that agree with what your own site says.
How do you measure GEO?
Rank trackers can't see it, because there's no rank to track. You measure GEO by asking the engines the questions your customers ask and recording what comes back: were you named, was your site cited, and who appeared instead. Because answers change from run to run, one check proves little — the signal is in repeated checks over weeks. The GEO pillar of the Speak Local scan covers the site side; the AI answer tracking covers the rest.