AEO vs GEO vs SEO: what each actually means for your business

AEO, GEO and SEO are three names for what is mostly one job: being found when someone looks for what you sell. SEO gets your page ranked in the list of links. AEO gets you picked as the direct answer. GEO gets you named as a source inside the answer an AI writes back. Three finish lines, one race.

If you understand SEO but the other two make your head hurt, you’re not behind. The acronyms are newer than the ideas underneath them, and a fair bit of the difference between them is marketing. Here’s what each one means, where they genuinely differ, and why a small business needs one plan rather than three.

SEO: getting ranked in the list of links

SEO, search engine optimisation, is the oldest and most familiar: getting one of your pages to rank near the top of a normal results page so someone clicks through to you. You already know this one, so no need to relitigate it, and it hasn’t gone anywhere. A page ranking first for a term people search still brings a steady stream of visitors who chose to come to you. It’s the floor the other two are built on, not a thing they replace, and how the ground under it is shifting is the whole of GEO vs SEO. What this page is really here to sort out is the two newer letters.

AEO: being the answer, not a link in the list

AEO, answer engine optimisation, is the work of getting your content picked as the direct answer rather than one link someone has to scroll to. The idea it describes is older than the AI boom, even if the three-letter label only caught on recently. It grew out of featured snippets, which Google introduced around 2014, and the voice-search years that followed: winning “position zero” meant Google lifted your sentence into the box at the top of the page, or Siri or Alexa read it aloud, and nobody clicked anything at all.

That same idea stretched to cover the AI answer boxes. An answer engine is anything that hands back one answer instead of ten links: a featured snippet, a voice assistant, the “People also ask” box, Google’s AI Overview. AEO is being the thing it reads out, and the practical work is making a passage on your page easy to lift out clean: the real question as the heading, a tight answer right underneath, structured so a machine can grab it without dragging in the paragraph around it. Because it started on Siri and the snippet box years before ChatGPT, AEO can feel like the broader, older cousin of GEO, which is a big part of why the two get muddled.

GEO: being a source the AI quotes

GEO, generative engine optimisation, is the work of getting your business named inside the answer a generative AI writes back. Ask ChatGPT, Perplexity, Gemini or Google’s AI Overviews a question and it doesn’t lift one answer off one page. It reads across many sources, writes a fresh answer that blends them, and names a handful it leaned on. GEO is being one of those named sources, so the emphasis shifts to being specific enough to quote and trusted enough elsewhere on the web that the engine reaches for you when it synthesises.

It’s the newest of the three terms, coined in a 2023 Princeton research paper, GEO: Generative Engine Optimization, which is worth knowing only because it dates the whole vocabulary: this stuff is about three years old. How generative engines read the web and how you actually get cited is the step-by-step GEO playbook; what changes about search itself, and why fewer people click, is GEO vs SEO.

The one real difference between AEO and GEO

Strip it to one word each and the genuine difference is extractive versus generative. AEO is about being extracted: the engine finds a clean answer already sitting on your page and lifts it out whole, the way a featured snippet quotes one page verbatim. GEO is about being synthesised in: the engine writes a fresh answer from many sources and you’re trying to be one it trusts and names, the way an AI Overview blends five pages and cites three. That’s the real line, and it’s why some people insist the two aren’t the same thing.

It has a practical tail, too. Because AEO is about getting a passage pulled out clean, it leans a little harder on-page: clear question headings, a tight answer underneath, structured data that spells out what your page is. Because GEO is about being trusted in a synthesis, it leans a little harder off-page: specific facts the engine can stand behind, and your name coming up consistently on other sites. Different accents, same instrument.

For a small business, it’s a distinction without a separate project attached, because the surfaces have mostly merged. Google’s AI Overview is an answer box and a generated answer at once, and the moves that win either one are the moves you’d already make: answer the real question clearly and early, be specific enough to quote, be trusted elsewhere. Do that and you’ve optimised for the snippet and the AI answer in one stroke. Knowing the difference matters more for understanding what you’re reading than for changing what you’d do to your site.

The rest of the alphabet soup: LLMO, AIO, GSO, AI SEO

The other acronyms you’ll bump into are the same shift wearing different badges. LLMO (large language model optimisation), AIO (AI optimisation), GSO (generative search optimisation), AI SEO and “AI search optimisation” all describe getting your business represented well when an AI answers a question. Wikipedia’s own entry for generative engine optimisation lists AEO, AIO, AI SEO and LLMO as names for the same practice. They multiply because each new tool and agency wants to plant a flag on the category, not because there are five different skills to learn.

Two quick corrections, because both cause real confusion. GEO is not “Google Engine Optimisation”, a mix-up that turns up in forums often enough to mention. The G is for generative. And GEO has nothing to do with geography or local search, even though the letters clash with geo-targeting. If you’ve done “local SEO” to show up for your town, that’s a separate discipline from getting cited by a generative engine.

Where all three overlap, which is most of the way

Strip the labels and all three share one foundation, and that foundation is most of the work. Answer engines and generative engines read the same web your SEO already works on, so a crawlable site, pages that answer real questions in plain language, specific and quotable facts instead of filler, and a name that’s mentioned and trusted elsewhere: every one of those feeds all three at once. Good SEO is roughly 80% of GEO and AEO, a point our GEO vs SEO guide lays out in full.

One 2026 wrinkle is worth writing down, though, because it’s where the tidy story frays: ranking and getting cited are drifting apart. When AI Overviews launched, the pages they quoted were mostly pages already ranking on Google’s first page, about three-quarters of citations by a 2024 count. By early 2026 an Ahrefs study of 863,000 keywords put that at 38%, meaning most sources an AI Overview now names sit outside the top ten organic results. The shared foundation still feeds both, but a number-one ranking no longer buys you the citation, which is the whole reason to check the AI answers in your category directly rather than trusting your Google position to speak for them.

So what should a small business actually do

Do the foundation once, and let it cover all three. There’s no separate AEO project and GEO project to run alongside your SEO. Answer the questions your customers genuinely ask, clearly and near the top of the page. Back your claims with real numbers and named specifics. Keep the site fast and readable for a machine. And get mentioned in the places your customers already trust, because being talked about elsewhere is what tips an AI toward naming you, which our guide on why a citation is the new backlink gets into.

Don’t buy the acronym. When someone pitches you a separate “AEO package” or “GEO service” on top of your SEO, they’re usually selling three names for one piece of work. Ask what they’d actually change on your site. If the answer is clearer pages, better structure and more mentions elsewhere, that’s the single foundation above, and it doesn’t need three invoices.

Learning the terms is mostly so you can stop worrying about them. Get found in a list, get picked as an answer, get cited by an AI: three outcomes from one well-built, well-trusted, clearly-written site. If you want the deeper reads, GEO vs SEO covers what’s changing and why the click is worth less than it was, and the GEO playbook is the step-by-step of getting cited. Both sit alongside the rest of the small-business AI shortlist.