Short answer: Generative engine optimization (GEO) is the work of getting your business named, quoted or linked in answers from AI tools such as ChatGPT, Google's AI Overviews, Perplexity and Gemini. SEO aims for a place in a list of links. GEO aims for a mention inside the answer itself. For a small business, that means a website AI can read, clear answers to customers' questions, and a good reputation on other websites.
Where the term came from
"Generative engine optimization" comes from a 2023 research paper by researchers from Princeton and other institutions. It was later accepted at KDD 2024, a leading data mining conference. The researchers call AI tools that write answers from web pages "generative engines". GEO is the work of getting your content into those answers.
The researchers rewrote web pages and measured how much of each page appeared in AI answers. Three methods did best: citing sources, adding quotations, and adding statistics. They improved visibility by 30–40% on the paper's main measure. Keyword stuffing, an old SEO trick, gave "little to no improvement". What worked also varied by subject.
The term has since spread. You'll also see answer engine optimization (AEO), AI SEO and LLM optimization. In practice they mean much the same thing.
How AI tools decide what to say
When you ask ChatGPT or Google a question with web search on, it runs searches of its own, reads a handful of pages, and writes a short answer. Sometimes it names sources or businesses and links to them. Your business can show up in two ways:
- Quoted: the AI uses a page from your website to answer a question, and links to it.
- Recommended: the AI names your business when someone asks for a business like yours.
What our own tests found
We tested this ourselves in September 2026, with real searches in ChatGPT and Google:
- Recommendations come from other websites. When we asked ChatGPT for the best dentist in 10 US cities, 24 of the 25 sources it cited were other websites vouching for dentists: ranking sites, review sites, directories and local magazines. See the dentist test. Across 6 searches in other industries, all 20 sources were third-party sites. See that test.
- Questions get AI answers, and those answers quote businesses. All 5 question searches we ran on Google opened with an AI Overview. For "how often should a furnace be serviced", every source it quoted was a heating company's own article. See the Google test.
- Buying searches still look like classic Google. The same test found local map listings first on all 5 buying searches, such as "emergency plumber denver". So GEO adds to local SEO. It doesn't replace it.
GEO vs SEO
SEO gets your pages ranked in Google's list of links. GEO gets your business named or quoted in the answer. They share most of the groundwork: a site search engines can crawl, pages that answer real questions, and a reputation other websites confirm. GEO puts more weight on facts AI can quote and on what other sites say about you. Read the full comparison.
How to start: the six signals
We group the work into six signals. Our free check tests most of them:
- Access. Let AI crawlers in. Check that your robots.txt file doesn't block them, and that your pages load without needing a login or heavy scripts.
- Clarity. Say plainly what you do, where, and for whom, near the top of your key pages. Use the same business name and details everywhere.
- Structure. Add structured data (schema markup) so your business name, address, services and hours are machine-readable.
- Answers. Write pages that answer the questions customers ask you, with the answer in the first sentence or two. Support it with sources and real numbers, which were among the best performers in the research.
- Reputation. Build genuine reviews and get listed on the directories, review sites and local lists in your industry. In our tests, almost every source behind ChatGPT's recommendations was a site like these.
- Guidance. Optionally, add an llms.txt file that summarizes your site for AI tools. It's a newer convention, so treat it as a small extra rather than a priority.
How to tell if GEO is working
Rankings don't tell you much here. Instead, ask ChatGPT and Google your customers' questions every month. Note whether you're named, whether your site is linked, and whether what they say about you is right. AI answers change from day to day, so look for the trend over several months rather than a single result.
See where you stand
Our free AI visibility check tests most of these signals in seconds, then emails you a report on what ChatGPT and Google's AI say when asked for a business like yours.
Frequently asked questions
What does GEO stand for?
Generative engine optimization. "Generative engines" are AI tools that write answers, such as ChatGPT, Google's AI Overviews, Perplexity and Gemini. The term comes from a 2023 research paper. Don't confuse it with "geo" as in geography, which usually refers to local SEO.
What's the difference between SEO and GEO?
SEO aims to rank your pages in a list of search results. GEO aims to get your business named or quoted inside an AI answer. Most of the groundwork is shared, so good SEO gives GEO a head start.
Is GEO the same as AEO?
In practice, yes. Answer engine optimization (AEO), AI SEO and LLM optimization all describe making your business easy for AI tools to find, understand and recommend.
How long does GEO take to work?
There's no fixed timeline, and no one can guarantee AI will mention you. Technical fixes can be read as soon as AI crawlers revisit your site. Reviews and listings on other sites take longer to build. Check the same questions monthly.
Can I do GEO myself?
Yes, the basics: let AI crawlers in, add structured data, answer common questions clearly, and build reviews and listings. A service helps if you want the work done for you and tracked month by month.