GEO, AEO, SEO. And what each one actually changes.

What's the difference between GEO, AEO and SEO?

They target three different things on the results page, in three different eras. SEO (search engine optimisation) is the old game: get your link to rank near the top of a list of blue links. AEO (answer engine optimisation) is newer: get your content into the answer box, the featured snippet, the AI overview that sits above the links and often means nobody scrolls to them. GEO (generative engine optimisation) is newest: get your content into the reply a generative tool composes on the fly, mid-conversation, tailored to the person asking.

The easiest way to feel the difference is to picture the same query in each. SEO asks: is my page in the ranked list? AEO asks: is my answer in the box at the top? GEO asks: did the model weave my point into the paragraph it wrote for this specific human? Same buyer, same question, three different places you can win or lose.

What does SEO change, exactly?

SEO changes where your link sits in a list. That's it, and for twenty years that was the whole game. You optimise a page so a search engine ranks it highly, the buyer scans the list, clicks a link, and lands on your site. The unit of victory is a ranking position, and the reward is a click.

It still matters, because ranked pages are also the raw material engines pull from for answers. But ranking alone no longer guarantees traffic, because more and more searches never produce a click at all. Which is the whole reason the next two exist.

What does AEO change?

AEO changes whether you're in the answer, not just the list. The featured snippet and AI overview sit above the blue links and often satisfy the query outright. If your content is the one lifted into that box, you get the visibility and the credibility of being "the answer", even when the buyer never clicks through. If it's a competitor's, they get it and you're invisible below the fold.

Winning here is about structure: a clean question, a direct answer right beneath it, marked up so the engine can identify it. It's less about out-ranking everyone and more about being the most liftable, unambiguous answer to a specific question.

What does GEO change?

GEO changes whether the model quotes you while it's writing. This is the genuinely new one. A tool like ChatGPT doesn't hand back a list or a single snippet; it composes a fresh reply, pulling from many sources, shaped by the context of the conversation and what it knows about the person. Your job is to be one of the sources it reaches for, and ideally to be named as it does.

Here's the mental shift that matters. A generative engine doesn't want one big definitive page it can point at. It wants lots of small, specific, quotable answers it can mix and match into a bespoke reply. A single sharp sentence answering one narrow question is more useful to it than a 3,000-word pillar page, because it can slot that sentence into a hundred different conversations.

SEO wanted one page to rank. GEO wants a hundred small answers it can recombine. Write for the recombination, not the ranking.

Does the GEO-versus-AEO distinction really matter that much?

Less than the industry would have you believe. Every few months a new three-letter acronym arrives with a conference and a course attached, and the framing is always "everything has changed, throw out what you knew". It hasn't, and you shouldn't. This is the next stage of a twenty-year line of algorithm changes, not a new religion that replaces the last one.

I've watched this cycle turn several times. The fundamentals barely move: publish genuinely useful content, make it legible to machines, earn trust from other credible sources. The tactics shift at the edges, and GEO does add one real edge, which I'll get to. But if you treat every acronym as a reason to start from scratch, you'll spend all your time relearning and none of it compounding.

It's the next stage of a twenty-year line of algorithm changes, not a new religion. Learn the edge, keep the fundamentals.

So what's genuinely new in GEO versus SEO?

The one real change: you build the sub-answers and FAQs an engine can recombine, rather than one page it's meant to rank. Under SEO you'd write a comprehensive guide and fight to rank it. Under GEO you break the same expertise into many discrete, quotable answers, each tied to a specific question, so the model has clean pieces to lift into whatever reply it's composing.

There's solid evidence for what wins here. The Princeton team's GEO study tested what changes a source's visibility in AI-generated answers and found that adding expert quotes, relevant statistics and citations lifted visibility by up to around 40%. Keyword-stuffing, the old SEO reflex, did nothing. That's the shape of the shift in one result: cite, quote, be specific and quotable; stop stuffing.

If you want the deeper how, our AEO, GEO and SEO work covers all three together, and the practical build is in how to structure a B2B site so AI quotes it. The headline, though, is simple: don't panic about the acronyms, do build the small quotable answers.

Not sure which of the three you're actually losing at? Book a free Growth Audit and we'll show you where you rank, where you're in the answer, and where the model quotes someone else instead.