What is generative engine optimization (GEO)?

Generative engine optimization (GEO) is the work of making your pages the ones AI assistants quote and link when they answer a question. It covers ChatGPT, Google's AI Overviews and AI Mode, Perplexity, Gemini, Claude and Microsoft Copilot.

Someone asks ChatGPT which running shoes suit beginners. It answers in a paragraph, citing three sites; those three get the visit. Everyone else is left in the dust. If you're anywhere in positions 4 to 10 on Google, you may get no click from that answer. That is the shift GEO responds to.

Those questions no longer start only in a chatbot. Chrome's address bar can now offer AI Mode alongside search, and in our tests its familiar prompt changed from "Search Google or type a URL" to "Ask Google". What that prompt means, and what changed shows where your buyers' questions now go.

Why GEO matters now

AI answers are associated with fewer clicks to the top result. On desktop keywords that showed an AI Overview, Ahrefs found the first result's click-through rate was 58% below its forecast without one. Why position 1 doesn't mean what it used to goes through the numbers.

The clicks that remain are more likely to go to the brands the answer cites. Seer Interactive tracked 53 brands through 2025. On informational queries with an AI Overview, cited brands earned 2.07% organic click-through and uncited brands 0.94%. Being cited is the new position one.

Where the term comes from

The name comes from a 2023 research paper, GEO: Generative Engine Optimization, by researchers at IIT Delhi and Princeton, later published at KDD 2024. The team built a test set of 10,000 questions. For each one, they gave the top five Google results to an AI model and measured how much of each page made it into its answer.

Then they rewrote the pages nine ways and asked again. Adding quotations, statistics and cited sources helped most. Keyword stuffing, the oldest SEO trick, made pages less visible than leaving them alone.

The finding that I'd pay most attention to is in the second table in the paper. Pages that gained most were the ones ranked fifth; citing sources lifted their visibility by 115%. However, the same edits made the page ranked first less visible. So GEO seems to help most where you don't already rank first.

These are lab results from one benchmark, and the model behind them is now old. On Perplexity, a real assistant, the best gain was 37%. Treat the numbers as a direction, not a promise for your site.

How AI engines choose what to cite

Assistants that cite sources search before they answer. Google calls this retrieval-augmented generation, or grounding. Its ranking systems fetch pages from the search index, and the model writes its answer from them, with links.

They also split your question into several searches. Google calls this query fan-out. Ask how to fix a patchy lawn and it may also search for the best grass seed and how to stop weeds coming back. A page that ranks for one of those side searches can be cited even if it doesn't rank for your question. ChatGPT runs fan-out searches too.

From the pages it finds, the model picks passages it can lift, attribute and trust. That is why a page can rank tenth and still be quoted: it had one clean, checkable claim the others didn't. What makes a web page citable by ChatGPT and Google AI sets out what the studies show about this step.

GEO vs SEO: what changes and what doesn't

GEO sits on top of SEO; it doesn't replace it. Google says its AI features are rooted in its core ranking and quality systems, so a page that isn't discoverable in Search is less likely to be cited. What changes is the prize, the unit and the scoreboard.

GEO vs AEO

Answer engine optimization (AEO) is another name used for optimizing answers in search and AI experiences. Today the two terms are used almost interchangeably. Google's guide mentions both in one breath, and says the same about each: many of the hacks sold under either name don't work.

How to do GEO in eight steps

• Let the crawlers in. Check that robots.txt and your firewall aren't blocking the crawlers behind AI answers.
• Get the page indexed and ranking. Google says pages must be indexed and eligible for a snippet to appear in its AI features, and other assistants cite what their search step finds.
• Answer first. Put the direct answer in the opening paragraph, before any background.
• Add what nobody else has: your own numbers, prices, results and opinions. Google calls generic summaries "commodity content" and says first-hand pages do better.
• Cite sources where you make the claim. In the GEO paper, quotations, statistics and sources were the biggest lifts.
• Give each heading one idea, and put comparisons in tables. More in how to structure a page an assistant will quote.
• Earn mentions off your site. Ahrefs analysed 75,000 brands: how often a brand was mentioned across the web correlated with its AI visibility at 0.66 to 0.71.
• Keep pages current. Update the facts, and the date, when things change.

What you can skip

Google's guide to its AI features, updated in July 2026, names five popular GEO tactics it doesn't need:

• An llms.txt file. Google Search ignores it; other tools may read one. See what llms.txt does and doesn't do.
• Special markup. Structured data isn't required for AI features, though it still helps with rich results.
• Chopping pages into tiny chunks. Google says its systems find the relevant part of a longer page.
• Writing in a special style for AI. There's no ideal length and no AI-only way to write.
• Buying or faking mentions. Google says inauthentic mentions help less than they seem, because its AI features rely on both high-quality ranking systems and systems that block spam.

Old SEO habits don't transfer either. Keyword stuffing made pages less visible in the GEO paper's tests. Building a page for every fan-out variation primarily to manipulate rankings can violate Google's scaled content abuse policy. And a 3,000-word article that answers in paragraph nine can lose to a 600-word one that answers first.

A worked example: one opening, rewritten

Here's the change that matters most, on a made-up web design studio's page about what a website redesign costs.

The first version has nothing to quote. The second answers in its first sentence, adds numbers only the studio has, and names the factors in a form an assistant can lift. It's a better opening for the person reading it, too.

How to measure GEO

Google and Microsoft report part of the picture. Search Console's generative AI performance report shows impressions for your pages in AI Overviews and AI Mode. Bing Webmaster Tools' AI Performance report counts citations across Copilot, Bing's AI summaries and select partner experiences.

ChatGPT, Claude, Perplexity and the Gemini app don't offer a site-owner citation report. For those, list 20 to 50 questions your buyers ask and put them to each assistant every month. Record whether you're cited, mentioned or missing, and who is cited instead. Answers change from run to run, so watch the trend, not one result. Measuring citations across four assistants has the full method.

The limits of GEO

• No one can guarantee a citation. The same question can cite different sources an hour later.
• Most of the evidence is correlation or lab work. The GEO paper used one benchmark; the Ahrefs and Seer figures are observational.
• Most assistants don't offer a site-owner citation report, so measuring means sampling by hand or paying for a tracker.
• Much of what's sold as GEO is SEO with a new label, and some of it is tactics Google says it ignores.

Where to start

Take ten pages you have that already earn you search traffic and rewrite their openings to answer the question straight away. That's usually a day of work, and it's the change most likely to get you cited, because those pages already have the level of authority that assistants lean on.

Before you rewrite anything, run the free AI visibility checker to make sure assistants can reach those pages at all. Our AI visibility page explains which signals we check and which no tool can see.

Rewriting ten openings is a day's work. Keeping every page you publish after that just as quotable is the habit that compounds, and most teams drop it by the second month. AutomatedSEO keeps it for you. Every one of its 30 articles a month opens with the direct answer, makes specific claims with their sources, gives each heading one idea, and is written in your voice from a profile of your own pages.