SEO vs GEO vs AEO: what actually differs

SEO optimizes for position in a ranked list. That single sentence explains most of its conventions.

Because the unit of competition is a page, SEO thinks in pages: one page per intent, a title and description written to win a click, internal links that concentrate authority on the pages worth ranking. Because the surface is a results page with ten slots, relative position is everything, and because the primary off-site signal is links, a large share of the budget goes to earning them.

None of this is obsolete. Classic search still sends most commercial traffic on the open web, and Google's own AI surfaces draw heavily on pages already ranking well. SEO is the entry ticket to the newer surfaces, not a discipline they replaced.

GEO optimizes for being named inside a generated answer. The unit is not the page but the passage.

A retriever pulls extracts, not documents, so a paragraph that only makes sense after the two above it is a paragraph that cannot be cited. GEO restructures content so each passage stands alone: the claim, its qualifier and its evidence in the same block. It also does something SEO never had to — it makes the entity itself resolvable, so that one name, one address and one set of facts appear identically across your site, your Google Business Profile and every directory carrying you. Conflicting records are the most common reason a model hedges rather than recommends.

The third piece is corroboration. Models weight what other sources say about you far above what you say about yourself, which inverts the SEO instinct to control the message on your own pages. And the measurement is different in kind: no ranking report can tell you whether Perplexity named you. You find out by running the prompts and reading the answers.

Answer Engine Optimization is the oldest of the three, and it started with featured snippets. The goal was to own the boxed answer above the results rather than a position inside them.

Its techniques are narrow and still work: pose the question as a heading, answer it immediately in forty to sixty words, structure the supporting detail as a list or table, and mark the whole thing up so a parser can find it. Voice assistants made this more valuable, because a spoken result has exactly one slot.

GEO absorbed most of it. The passage-level discipline AEO invented is the same discipline a retriever rewards, so the two are now hard to separate in practice. Where a vendor sells AEO as a distinct service today, ask what it includes that GEO does not — the answer is usually nothing.

More than the acronyms suggest. Every one of them fails at the same place: a site that cannot be crawled, rendered or parsed.

Shared underneath all three are crawl access, server-rendered content that does not depend on client-side JavaScript to exist, fast and stable pages, clean information architecture, and accurate structured data. Get those wrong and no amount of strategy above them matters, in any of the three disciplines.

This is the practical reason they are sold together. Splitting the foundation across three invoices would mean paying three times for one pass over the same code.

Three places, and they are worth being precise about.

Structure: SEO optimizes a page as a whole; GEO and AEO optimize the individual passage, which changes how you write rather than just what you write about. Off-site: SEO wants links, GEO wants mentions and consistent records, and a link from a source that describes you incorrectly is worth less to GEO than a mention that describes you correctly. Measurement: SEO reads positions from a tool, GEO samples prompts by hand across engines that disagree with each other, and the second is slower, noisier and impossible to fully automate.

That last point is where most of the industry quietly stops. If an agency selling you GEO cannot show you a prompt panel with per-engine results, they are selling you SEO with a new label.

Almost certainly both, weighted by where your buyers actually are.

If your category still runs on people typing a query and clicking a link — most local services, most transactional retail — classic SEO earns the majority of the budget, with GEO protecting the flank as assistants take share. If your buyers research by asking questions of an assistant, which is increasingly true in B2B, software and considered purchases, the weighting flips and being absent from generated answers costs you the shortlist before you know a shortlist existed.

The way to settle it is not an argument. Write down the forty to eighty questions your buyers genuinely ask, run them across the engines, and see who gets named today. That baseline decides the split, and it takes an afternoon.