AEO vs SEO: What Actually Changes When AI Answers the Question
Short version: SEO optimises for a ranked list of links; AEO optimises for being quoted inside a single synthesised answer. About two-thirds of the work overlaps — the last third is new, and it’s the third that decides whether AI engines cite you.
The core difference
Section titled “The core difference”| SEO | AEO | |
|---|---|---|
| Surface | Results page with 10+ links | One answer citing 3–6 sources |
| Unit of success | Ranking position and clicks | Citation and recommendation |
| Crawler | Googlebot / Bingbot | GPTBot, PerplexityBot, ClaudeBot, Google-Extended and friends |
| Content that wins | Comprehensive, keyword-aligned pages | Quotable, answer-first passages |
| Failure mode | Page 2 obscurity | Total absence — there is no page 2 |
What transfers directly from SEO
Section titled “What transfers directly from SEO”Don’t throw anything away. These classic disciplines are also AEO ranking factors:
- Technical hygiene — fast pages, clean HTML, working sitemap, canonical URLs.
- Structured data — schema markup was nice-to-have for rich snippets; for answer engines it’s core infrastructure.
- Topical authority — a site that covers its niche deeply is more citable than a thin one, in both worlds.
- Digital PR — mentions on third-party sites teach engines your entity exists and can be trusted.
What’s genuinely new in AEO
Section titled “What’s genuinely new in AEO”- A second robots.txt audience. Googlebot being allowed says nothing about GPTBot. Many sites still carry blanket AI-bot blocks added in 2023 — instantly disqualifying themselves from ChatGPT citations. (The free checker tests all six major AI crawlers.)
- llms.txt. An emerging companion standard to robots.txt that hands LLMs a curated index of your best content — see the llms.txt guide.
- Passage-level quotability. Engines lift 1–3 sentences, not whole pages. Every important page needs at least one paragraph that answers a question completely on its own.
- Question-space research replaces keyword research. Instead of “head keyword + modifiers”, you map the actual questions buyers ask a chatbot — longer, more conversational, more comparative (“X vs Y for small UK retailers”).
- No CTR to optimise. Titles and meta descriptions still matter, but as facts the engine quotes, not as ad copy chasing a click.
Where to spend effort in 2026
Section titled “Where to spend effort in 2026”If you have a working SEO base, the highest-ROI AEO sequence is:
- Unblock crawlers — one robots.txt fix can be the whole ballgame.
- Ship entity + FAQ schema sitewide.
- Rewrite your ten most valuable pages answer-first.
- Publish llms.txt.
- Then expand question-space content over time.
Measure it the honest way: run the AI visibility check monthly, and spot-check by asking ChatGPT and Perplexity the questions you want to win — here’s the full playbook.
Does AEO replace SEO? No. Google still drives the majority of discovery traffic in 2026; AEO is additive, and most AEO work strengthens SEO too.
Is AEO the same as GEO (Generative Engine Optimization)? Effectively yes — GEO, AEO and “LLM SEO” are competing names for the same discipline. AEO has emerged as the most common umbrella term.