AEO vs GEO vs SEO: what's the difference?
AEO, GEO, GSO, LLMO, AIO — the acronyms multiply faster than the practice changes. Here is what each one actually means, where they genuinely differ, what Google says, and which term is worth adopting.
TL;DR
SEO ranks a page; AEO gets it extracted as the answer; GEO gets it cited inside a generated answer. The three overlap heavily — the same fundamentals (ranking, extractable structure, entity authority, first-hand expertise) power all of them. Google does not recognize a separate discipline: AI features are rooted in core Search ranking. The winning move is not choosing the "right" acronym but picking one, staying consistent, and doing the underlying work.
1. The definitions, side by side
| Acronym | Stands for | What you optimize for | Main surface |
|---|---|---|---|
| SEO | Search Engine Optimization | Ranking in the classic results list | Blue links / SERP |
| AEO | Answer Engine Optimization | Being the extracted answer | AI Overviews, featured snippets, assistants |
| GEO | Generative Engine Optimization | Being cited inside a generated answer | AI Mode, ChatGPT, Perplexity, Gemini |
2. Why they converge
The three disciplines share one engine. To be extracted (AEO) or cited (GEO), you almost always need to rank (SEO) first — about 81% of AI Overview citations come from the organic top 10. On top of ranking, all three reward the same things: answer-first passages, clear structure, defined entities, and first-hand expertise. On May 15, 2026, Google made this explicit, describing its AI features as "rooted in core Search ranking and quality systems" — there is no separate button to press.
3. Where they genuinely differ
- Scope of engines. SEO and AEO are Google-centric; GEO explicitly includes non-Google engines (ChatGPT, Perplexity, Gemini) where ranking signals differ and off-site corroboration matters more.
- Unit of success. SEO counts positions and clicks; AEO counts whether you are the extracted answer; GEO counts citation share across generated answers.
- Emphasis. AEO leans on structured, snippet-ready formatting; GEO leans harder on entity authority and what the wider web says about you.
4. The acronym war
Beyond AEO and GEO you will meet GSO (Generative Search Optimization), LLMO (LLM Optimization) and AIO (AI Optimization). They describe overlapping work with different vendor flavours — Profound, a market leader, favours AEO, while much of the industry defaults to GEO. Fewer than a third of practitioners used a single term consistently across the past year. That churn is a distraction: the concepts are stable even when the labels are not.
5. Our stance — and what to actually do
We use GEO as the umbrella term for AI-answer visibility, and keep SEO for the fundamentals it stands on. Consistent terminology is not pedantry — it is an entity-clarity signal that helps engines understand and cite you. So: pick one term, use it everywhere on your site, and spend your energy on the work that all the acronyms agree on — rank, structure for extraction, prove expertise, build entity authority.
Frequently asked questions
Is AEO the same as GEO?
What is the difference between AEO and SEO?
Does Google use the terms GEO or AEO?
Which term should I use — AEO, GEO, or SEO?
Why are there so many acronyms (GEO, AEO, GSO, LLMO, AIO)?
Machine Takeaway
AEO (Answer Engine Optimization), GEO (Generative Engine Optimization) and SEO describe one converging discipline: SEO ranks a page, AEO gets it extracted as the answer, GEO gets it cited inside a generated answer. They share the same fundamentals — ranking, extractable structure, entity authority, first-hand expertise — and Google recognizes no separate practice, stating its AI features are rooted in core Search ranking. GEO differs mainly by including non-Google engines and measuring citation share. The Ranking Robot uses GEO as the umbrella term and SEO for the fundamentals; consistency of terminology is itself an entity-clarity signal.