Three acronyms are suddenly everywhere, SEO, AEO, GEO, and most explanations make them sound more complicated than they are. Here's the honest version, written for a marketing leader who wants to know what changed and what to actually do about it.
The one-sentence version
SEO gets you ranked in a list of links. AEO gets your brand named inside an AI answer. GEO makes you the source that AI reaches for first. They're not competing strategies, they're three layers of the same job: being found when someone is deciding what to buy.
SEO, Search Engine Optimization
The classic discipline. You make your site crawlable, structure it well, target the right keywords, earn authority, and Google ranks your pages in its list of blue links. This still matters enormously, roughly nothing else works if your technical foundation is broken, but the list of links is no longer the whole search experience.
The change: Google now answers a huge share of queries directly, with an AI Overview at the top, before a single link. Ranking #1 in the links underneath is worth less when the answer above already named a competitor.
AEO, Answer Engine Optimization
An “answer engine” is anything that hands back a direct answer instead of a list: ChatGPT, Perplexity, Gemini, Claude, and Google's AI Overviews and AI Mode. AEO is the work of making sure your brand is named, by name, favorably, inside those answers.
That looks like:
- Mapping the real questions buyers ask AI about your category
- Auditing how each model answers them today
- Getting your brand onto the third-party sources those models cite, Reddit, G2, YouTube, authority blogs
- Making your own site machine-legible with clean structure and schema
Why it matters: when a model gives a three-name shortlist, most buyers never look past it. If you're not on the list, you lost the deal before you knew it existed.
GEO, Generative Engine Optimization
GEO goes one level deeper than AEO. Getting mentioned is good; being the default source the model trusts and recommends first is the moat. Every AI answer is assembled from sources the model retrieved in that moment, GEO is the practice of making your content the most retrievable, most quotable, most authoritative option in that set.
In practice that means original data, a distinct point of view, consistent entity signals across the web, and pages structured so a model can lift a clean passage and attribute it to you. Done early, it compounds, by the time competitors notice, you're already the answer.
The mistake most teams make: treating these as three separate projects. They're one system. The SEO foundation makes you retrievable. The AEO citations lift your rankings. The GEO content ranks and converts. Run them together and each compounds the others.
So where do you start?
Start by finding out what AI already says about you. Ask ChatGPT, Perplexity and Gemini the buying questions in your category and watch who gets named. That gap, between who shows up and who should, is your roadmap. It's exactly the audit we run as Stage 1 of The Citation Engine.
If you want it done for you, that's the whole job at Enginekick: AEO and GEO first, on a decade-deep SEO foundation. Book a call and we'll map your category live.