The verdict
SEO optimises to rank a page in a list of links; AEO optimises to be quoted inside an AI-generated answer. They are not rivals: AEO builds on SEO. Strong SEO fundamentals are the foundation, and AEO adds machine-readable structure, self-contained answers, and citation signals on top.
| Dimension | SEO | AEO |
|---|---|---|
| Goal | Rank in the list of links | Be cited inside the AI answer |
| Unit optimised | The page | The passage / chunk |
| Wins by | Keywords, links, rankings | Clarity, structure, corroboration |
| Format that wins | Comprehensive pages | Self-contained answers, tables, definitions |
| Key signals | Backlinks, on-page SEO | Schema, entities, third-party mentions, freshness |
| Measured by | Rankings, clicks, traffic | Citations & share of AI voice |
| Keyword stuffing | Ineffective | Actively harmful |
When SEO is the priority
If your site is hard to crawl, slow, or thin, fix that first. AEO cannot rescue content that search engines and AI systems can't read or trust in the first place. SEO is the substrate.
When AEO is the priority
If you already rank but you're invisible in AI answers — competitors get cited and you don't — the gap is AEO: structure, self-contained answers, entity clarity, and off-site corroboration.
Does AEO replace SEO?
No. AEO builds on SEO. Strong SEO fundamentals — crawlability, quality content, and authority — are the foundation AEO sits on. AEO adds machine-readable structure, self-contained answers, and citation signals on top.
Should I do AEO or SEO first?
Get the SEO substrate right first — a crawlable, fast, well-structured site — then layer AEO on top. In practice they overlap heavily, so most of the work serves both at once.
Related: The AEO Guide · Glossary
Ranked but not
cited?
That gap is AEO. An audit shows you exactly how wide it is.