What Is GEO? Generative Engine Optimization Explained

ByTyler Ziton

GEO, or generative engine optimization, is the practice of making your content more likely to be quoted in AI-generated answers from ChatGPT, Gemini, Perplexity, and Google’s AI features. The term comes from a 2023 research paper that found the right edits lifted visibility in those answers by up to 40%.

Keep reading for where GEO came from, how it differs from the SEO you already know, and the five steps that tested best.

Key Points

  • GEO started as a research paper from Princeton and IIT Delhi, first posted in November 2023 and published at KDD 2024.
  • Adding quotations, statistics, and cited sources tested best, lifting visibility 30% to 40%.
  • Keyword stuffing scored below the baseline of changing nothing.
  • Google’s own guide says optimizing for AI search is “still SEO.”
  • A 2026 review of 45 studies found no GEO tactic with a stable effect across every platform, so treat it as a layer on SEO and not a replacement.

What Is GEO?

GEO is generative engine optimization: editing your pages so AI tools that write answers pull from them and name you as a source. A generative engine is any tool that reads several sources and writes one reply, which covers ChatGPT, Gemini, Perplexity, and Google’s AI Overviews and AI Mode.

The audience is large enough to plan around. At Google I/O in May 2026, Sundar Pichai said AI Overviews has over 2.5 billion monthly users and AI Mode has passed 1 billion, with the Gemini app above 900 million.

But a generated answer has no page two. It names a handful of sources, and everyone else is invisible for that question. GEO is the work of being one of the handful.

Where Did GEO Come From?

GEO came from a research paper by a team at Princeton and IIT Delhi, first posted in November 2023 and published at the KDD conference in 2024. It tested nine ways to make a page more visible inside AI-generated answers.

The team behind the GEO paper built GEO-bench, a benchmark of 10,000 queries, ran them through a generative engine, and measured how much of each source made it into the answer. That setup turned “how do I show up in ChatGPT” from guesswork into something you could test.

The name stuck because it filled a gap. Search engines had SEO, answer boxes had AEO, and generated answers got GEO, a three-way split I map in SEO vs AEO vs GEO.

None of that made the tactics exotic, though. The paper’s winners are the ones editors have pushed for a century: clear writing, evidence, and attribution.

How Does a Generative Engine Pick Sources?

A generative engine picks sources in two steps: it runs a search to fetch a set of pages, then quotes the few passages that best answer the question. Your page has to survive both steps.

Step one is retrieval

Retrieval is ordinary search working behind the scenes. Google’s AI features draw from Google’s index, and ChatGPT uses a mix that changes by plan.

On the ChatGPT side, a RESONEO study of 1,249 ChatGPT answers in mid-2026 found free accounts in thinking mode leaning about 75% on OpenAI’s own index, while the paid thinking mode took about 75% of its results from Google.

So ranking still matters, just less neatly than it used to. Ahrefs found that 37.9% of the URLs cited in AI Overviews also sat in the top 10 results, down from about 76% in mid-2025.

Step two is selection

Selection is where GEO does its work. Out of the pages it fetched, the engine keeps the passages that answer directly and carry something concrete. In the RESONEO data, a page ChatGPT opened got cited 74% of the time, against 7% for pages it only retrieved.

Getting fetched is SEO, and getting quoted is GEO. That’s also why the same page can rank third in Google and still be the first source named in the answer.

How Is GEO Different From SEO and AEO?

GEO differs from SEO in what you win: SEO earns a position on a results page, and GEO earns your words inside the generated answer. AEO chases the same result as GEO under an older name.

What ChangesSEOAEOGEO
What you winA rankingThe quoted answer boxA citation in a written answer
WhereGoogle and Bing resultsFeatured snippets, voice, AI OverviewsChatGPT, Gemini, Perplexity, AI Mode
Unit of workThe pageThe passageThe passage plus your brand’s mentions
ScoreboardRankings and clicksSnippets wonCitations and AI referrals

My GEO vs AEO comparison shows the two labels cover the same work in practice.

Google agrees, in its own dry way. Its guide to optimizing for generative AI names both AEO and GEO, then says “optimizing for generative AI search is optimizing for the search experience, and thus still SEO.” It also tells site owners to put effective SEO ahead of “AEO/GEO hacks.”

So don’t buy the three-discipline pitch. One crawlable, well-proven page feeds rankings, snippets, and generated answers at once, and I make the full argument in is GEO just SEO with a new name.

How to Do GEO in 5 Steps

1. Answer the question, then expand

Open every section with the direct answer in one or two sentences, then add the detail. Generated answers are stitched together from passages, and a passage that stands alone is the easiest one to stitch in.

That’s the same answer-first shape featured snippets reward, so one writing habit serves both. The formatting side of it is what I walk through in what AEO is and how to do it.

2. Add statistics that do real work

Adding relevant statistics was one of the paper’s best edits, scoring about 31% above the baseline on its main measure. A number turns a claim into an argument, and engines quote arguments.

When you add one, tie it to the exact claim it supports. Your own results count double, since nobody else has them and an engine looking for something concrete has one place to find them.

3. Cite and quote credible sources

Quotations were the single best method in the paper at about 41% above baseline, and citing sources added roughly 27%. An engine treats a sourced page as one that’s safe to repeat.

Link the primary source at the sentence where the claim lands, not in a pile at the bottom. For the page-by-page version, my GEO checklist expands these steps into 10 edits.

4. Write it clearly

Fluency edits, meaning cleaner and easier-to-read text, improved visibility by about 28% in the paper’s tests. Short sentences and simple words survive being quoted, and tangled ones get skipped.

One way to catch the tangles is to read your answer out loud before publishing. If you stumble, so will the model summarizing you.

5. Stay crawlable and track it

None of the first four steps count if engines can’t fetch the page. Check robots.txt and the page’s indexing status in Search Console before you touch a word of copy.

Then watch whether you’re being quoted, which is its own short job and gets a section below.

Does GEO Work?

GEO works in testing, with gains of up to 40% in the original paper and up to 37% in its follow-up test on Perplexity. Lower-ranked sites gained the most: citing sources raised visibility 115.1% for pages ranked fifth in Google.

But the tests have limits you should know about. They ran on a benchmark with a 2023 model, and the page was already among the five sources handed to the engine. A 2026 review of 45 GEO studies concluded that “no reviewed technique shows a stable, longitudinal, cross-platform causal effect.”

That review isn’t a reason to skip GEO. It tells you where to set expectations: these edits raise your odds of being quoted once you’re in the running, and they can’t get you into the running by themselves.

Does GEO traffic convert?

GEO traffic converts better than most channels once it arrives. Adobe found AI traffic to US retail sites converted 42% better than other traffic in March 2026, after growing 393% year over year in the first quarter.

Does GEO replace SEO?

GEO does not replace SEO, since retrieval still runs on search and a page that can’t be found can’t be quoted. Google’s guide tells site owners to put effective SEO ahead of “AEO/GEO hacks,” and the RESONEO data shows even ChatGPT leaning on Google results.

The same page shape is how I rank in Google AI Overviews, so the work pays twice.

How Do You Measure GEO?

You measure GEO with three numbers: how often you’re cited for your top questions, AI-referred sessions, and AI-referred orders. Rankings can’t tell you any of the three.

For citations, ask ChatGPT, Gemini, and Perplexity your ten most valuable questions once a month and log who gets named. Run each one a few times, since answers change between runs. If you’d rather automate it, the options are in my roundup of AI visibility tracking tools.

For sessions and orders, GA4 added an AI Assistant channel in May 2026 that groups most chatbot traffic. Search Console’s generative AI report covers the Google side, though it shows impressions only.

Give it a quarter before you judge. Citations shift month to month, and one screenshot in either direction proves nothing.

What Does GEO Look Like for a Shopify Store?

GEO for a Shopify store looks like three jobs: answer-first text on product and guide pages, real numbers from your own orders and reviews, and mentions on the sites AI tools read. No part of it calls for a new platform or a rebuild.

  • Product pages: sizing, shipping, and specs in text on the page, with the answer first
  • Buying guides: one clear pick per use case, backed by your own review counts and return data
  • Off-site: reviews, Reddit threads, and press that mention the brand by name

Beyond the pages, I’ve seen the order of operations play out on client stores. Fieldsheer’s buying guide hit #1 in Google for “best heated jackets for women” within two weeks, got cited in the AI Overview in the same window, and ChatGPT later named the brand its top pick. The steps are in the Fieldsheer case study.

Notice what came first there. The ranking and the press mention did the heavy lifting, and the AI answer followed. That is how I run it inside my AI search services for Shopify stores, and it is why most agencies fold the work into an SEO retainer, at the prices in what GEO costs.

Want Your Brand Inside the Answer?

GEO is a research-backed name for work you mostly know already: answer first, prove it with numbers and sources, write clearly, and stay crawlable. Start with your ten most important pages and give each one a real number and a primary source.

Book a call and I’ll run your top questions through the major AI tools, show you who’s getting quoted today, and map the edits that close the gap. If you want it handled every month, that is what my AI search services are for.

Sources:

SEO Consultant

Tyler Ziton is an SEO consultant and founder of Ziton Digital. He has driven $21M in annual organic revenue for 30+ brands including Park Seed, Flexfire, and Fieldsheer, and builds organic revenue systems for Shopify stores using SEO, AI search, and CRO.

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