The definition
AEO is answer engine optimization: the work of improving how a brand shows up when engines answer questions directly, whether that engine is ChatGPT, Perplexity, Google's AI results, or a voice assistant. Success is being the answer, or being named and cited inside it.
The unit of competition changes with the format. Classic SEO competes for a position on a list of links; AEO competes for presence inside a single synthesized answer, where being absent means being invisible.
Where the term comes from
The phrase circulated in the featured-snippet and voice-search era, when position zero first made one answer the whole result. It was revived and sharpened once AI assistants began answering with generated text, because the old vocabulary of rankings stopped describing what teams were optimizing for.
Usage settled quickly: AEO for the answer-engine framing, GEO for generative engines broadly, with heavy overlap between the two in practice.
How AEO sits next to the adjacent acronyms
| Topic | Term | Expands to | Optimizes for |
|---|---|---|---|
| AEO | Answer engine optimization | Being named and cited when an engine answers a question directly | |
| GEO | Generative engine optimization | Presence in generated responses across AI systems broadly | |
| SEO | Search engine optimization | Ranking in the list of links a search engine returns |
AEO and GEO name nearly the same work from different angles; SEO remains the discipline both grew out of and still depend on for crawlability and indexing.
How practitioners use the word
In practice AEO shows up three ways: as a program name for the team's answer-engine work, as a page attribute when content is written answer-first with question-led structure, and as a measurement conversation about mention rates and citations rather than rankings.
For the full walkthrough of the practice behind the word, the what is AEO guide covers the workflow end to end.