GEO is the practice of making a brand appear and be cited inside answers produced by generative search engines such as ChatGPT, Perplexity and Gemini. Where classic SEO targets a position in a list, GEO targets inclusion in the answer itself.
The term entered wide use with "GEO: Generative Engine Optimization", published at KDD 2024 by researchers from Princeton, IIT Delhi, Georgia Tech and the Allen Institute. The study tested nine tactics across 10,000 queries and measured that adding statistics improved visibility by 41% and adding quotations by 28%.
GEO does not replace SEO. Most generative engines still rely on classic search indexes — ChatGPT search leans on Bing — so a page that is not indexed is outside GEO as well. The difference starts after indexing: SEO improves the position of a page, GEO improves the odds that a passage from it is selected.
How does GEO actually differ from SEO?
Classic SEO targets a position in a list of results; GEO targets inclusion in the answer itself. The difference shows up in the unit of measurement: in SEO the unit is a page and its position, in GEO it is a passage. A generative engine does not take your page whole — it takes the 150-300 word block that fits the question. Good GEO pages are therefore built from blocks that still make sense when lifted out.
The two are not alternatives. A page that is not indexed cannot be cited either: ChatGPT's search side runs on the Bing index, Google's AI Overviews on Google's. Technical SEO is a precondition for GEO, not a competitor to it.
Has anyone measured which tactics work?
Yes, but narrowly. The GEO paper published at KDD 2024 tested nine tactics across 10,000 queries. The two strongest findings: adding statistics raised visibility by up to 41%, adding quotations by up to 28%. The same study found no meaningful effect from increasing keyword density.
Those results come from a single study, and the engines have changed since. Treat any source promising "do this and you'll get cited" with scepticism. What the evidence supports is narrower: content carrying verifiable numbers and sources is more likely to be selected.
How is GEO work measured?
The equivalent of rank tracking here is prompt tracking: fixing a set of questions relevant to your category, asking them across engines on a schedule, and recording whether you appear. Two metrics belong in separate columns — mentions (your name appears) and citations (your page is linked).
A third source is free and often ignored: the AI Performance report in Bing Webmaster Tools gives real data from the index behind ChatGPT search.
Frequently asked
Is GEO replacing SEO?
No. Most generative engines still rely on classic search indexes; a page that is not indexed cannot enter an answer. GEO is a second layer that begins after indexing, not a substitute for it.
How long does GEO work take to show results?
The honest answer: it varies and cannot be guaranteed. Crawl frequency, site authority and query competitiveness all matter. The only thing you can measure is movement in your own question set — which is why measurement has to start with a baseline.
Do small sites stand a chance in GEO?
Yes, and more realistically than in SEO. In Ahrefs' October 2025 analysis, 28.3% of the pages ChatGPT cited most had no organic Google visibility at all. A well-written small page can outrank a large site inside an answer.
