SEO vs AEO vs GEO: What Each One Actually Means
Three acronyms, heavily overlapping, frequently confused and often sold as though they were the same thing. Here is what each actually targets and the order they are worth doing in.
SEO works to rank a page in a list of search results. AEO works to have a passage quoted as the direct answer in a snippet or AI Overview. GEO works to have a business recommended by name when someone asks an AI assistant for options in a category. They share a technical foundation and differ in what counts as success.
Key takeaways
- All three depend on the same crawlable, well-structured, substantive site.
- SEO targets a position; AEO targets a quotation; GEO targets a recommendation.
- They are sequential, not alternatives — SEO foundations make the other two possible.
- Anyone selling GEO as a replacement for SEO is selling the roof without the walls.
The comparison in one table
| SEO | AEO | GEO | |
|---|---|---|---|
| Target | A position in results | A quoted answer | A named recommendation |
| Surface | Google results pages | Snippets, AI Overviews, voice | ChatGPT, Perplexity, Gemini, Claude |
| Success looks like | Ranking in the top few | Your text read aloud or shown | Your business named in a shortlist |
| Primary lever | Relevance and authority | Structure and extractability | Entity clarity and corroboration |
| How it is measured | Rank tracking | Snippet appearances, impressions | Prompt sampling over time |
| Measurement precision | High | Medium | Low — sampling only |
SEO: competing for a position
Search engine optimisation is the long-standing discipline. The target is a results page, and the goal is to appear high on it.
It breaks into three parts. Technical SEO makes the site crawlable, indexable and fast. On-page SEO gives each page a clear subject matching a real search. Authority — largely links and reputation — gives the engine a reason to prefer your page over others covering the same ground.
Success is measurable with precision: you rank or you do not, and rank tracking tells you where.
AEO: competing to be the answer
Answer engine optimisation targets the moment a search engine answers the question directly rather than listing links — a featured snippet, an AI Overview, a voice assistant reading a result aloud.
The work is structural. A page becomes extractable when it contains a passage that stands alone: a question-phrased heading followed immediately by a self-contained answer of roughly 40 to 60 words that makes sense with nothing around it. Add FAQ markup matching the visible questions, tables for comparisons, numbered lists for sequences.
The important point is that AEO is mostly a reformatting discipline. The same facts, reorganised so a machine can lift them cleanly, become eligible for placements that conventionally written prose cannot reach.
GEO: competing to be recommended
Generative engine optimisation targets a different behaviour entirely. Someone asks an assistant to recommend or compare options in a category, and gets back three or four names.
There is no position to occupy. The model either names you or it does not, and what decides that is confidence: does it recognise your business as a distinct entity, is it sure what category you belong to, and does it find enough consistent corroboration to mention you without hedging.
The work is consequently different in kind. Entity clarity — the business described identically everywhere it appears. Organization schema stating plainly what the company is. Category definitions in plain language. Decision criteria, including honest statements about who you are not for. Consistency across every profile and directory.
Most businesses do not need all three at once, and spending on the wrong one first is the usual reason marketing budgets disappear without result. A free strategy call will tell you which one your situation actually calls for. Get in touch.
How they stack
They are not alternatives. They are layers, and the order matters.
SEO is the foundation. A site that cannot be crawled, has no substantive content, or loads too slowly to be indexed properly has nothing for any of the three to work with. Nothing above this layer functions without it.
AEO sits on top. Once pages are crawlable and relevant, formatting them for extraction makes them eligible for snippets and AI Overviews. This is largely restructuring content that already exists.
GEO sits alongside both. It draws on the same crawlable content but adds entity consistency and corroboration work that extends beyond your own website.
Anyone offering GEO as a replacement for SEO is proposing to build a roof with no walls underneath it.
Which to do first
Do SEO first if your site is new, slow, thin on content, or has technical problems preventing indexation. Nothing else works until this is sound.
Add AEO when your content ranks but gets few clicks, or your category increasingly shows AI Overviews above the organic results. The signal is impressions without proportional clicks.
Add GEO when your customers research before contacting anyone, or your category is one where buyers reasonably ask an assistant for recommendations. More relevant for considered purchases than for emergency services, where someone with a burst pipe is calling the first number they see.
For most local service businesses the honest order is: SEO foundations, Google Business Profile, then AEO on the questions customers actually ask, then GEO if the category warrants it.
Frequently asked questions
Is GEO just a rebranded version of SEO?
No, though the overlap is substantial. GEO adds work that conventional SEO does not cover — entity consistency across sources, explicit category definitions, decision criteria content — and is measured by sampling rather than rank tracking. But it depends entirely on SEO foundations being in place.
Do I need all three?
Most businesses do not. SEO is near-universal. AEO pays off where customers ask questions before buying. GEO matters most in categories people research. Doing one properly beats doing three badly.
Which is hardest to measure?
GEO, by a clear margin. SEO has rank tracking; AEO has snippet appearances and Search Console impressions. GEO can only be sampled — running a set of prompts periodically and recording whether you were named. Any provider claiming a precise GEO metric is overstating what exists.
Will AI search replace Google?
Both behaviours currently coexist, and the mix differs by query type and by person. Treating it as a replacement is premature; treating AI answers as irrelevant is already wrong. The practical response is to make content work for both, which the shared foundation makes feasible.
Not sure which of these your business needs? That is a reasonable question and the answer depends on where your customers actually come from. A free strategy call will give you a straight recommendation — including when the answer is to fix something else first.
Book a free strategy call, or read more about SEO, AEO and GEO.