SEO ranks pages in search results, AEO makes content the direct answer, and GEO gets content cited inside AI-generated answers. They are three layers of the same goal, being found when people ask, and they share the same foundation: crawlable, helpful, trustworthy pages.
Definitions
- SEO (Search Engine Optimization): improving pages so they rank in search results and earn clicks.
- AEO (Answer Engine Optimization): structuring content so answer engines extract it as a direct answer. More on AEO.
- GEO (Generative Engine Optimization): improving how generative AI search systems such as ChatGPT search, Perplexity and Google AI Overviews select and cite your content.
Side-by-side comparison
| Aspect | SEO | AEO | GEO |
|---|---|---|---|
| Main question | Will my page rank? | Will my content be the answer? | Will AI cite or mention me? |
| Surfaces | Search results | Snippets, voice, AI answers | AI Overviews, ChatGPT, Perplexity, Copilot |
| Unit that wins | Page | Passage | Passage and brand entity |
| Key tactics | Keywords, links, technical health | Direct answers, question headings, schema | AEO tactics plus entity clarity, facts and independent mentions |
| Measurement | Rankings, clicks | Snippet ownership, AEO score | Citation and mention rates in sampled answers |
Where they overlap
All three fail if crawlers cannot reach the page, if the content is thin, or if the site gives no reason to trust it. That is why the best order is: fix SEO blockers, add AEO structure, then strengthen GEO signals such as entity schema and mentions on sites AI already cites.
What to prioritise
- SEO blockers: indexing, crawl access, speed and duplicate content.
- AEO structure on your most valuable pages: direct answer, question headings, FAQ schema.
- GEO signals: Organization schema with sameAs, specific facts, and mentions on the domains that win citations.
- Measure all three: rankings in Search Console, your AEO score, and citations with the AI citation gap finder.
Common myths
- "SEO is dead." Answer engines retrieve from search indexes; strong SEO is still the entry ticket.
- "AEO is just FAQ schema." Schema helps, but the visible direct answer and specific content matter more.
- "You can see your ChatGPT ranking." No tool can; you can only sample answers and measure citation rates.
Check your own page: the free AEO score checker scores 22 factors, compares you with competitors and shows who AI cites for your question.