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Why there are two names
AEO is the older term. It was already in use by 2018, when “answer engine” meant voice assistants and the answer boxes at the top of search results.
GEO arrived in 2023, from a research paper about AI systems that write their answers instead of listing links. When AI chat took off, both names ended up describing the same job.
| Term | Stands for | Where it started |
|---|---|---|
| AEO | Answer engine optimization | Voice search and answer boxes, before AI chat |
| GEO | Generative engine optimization | A 2023 research paper on AI-written answers |
Google’s guide for site owners treats both as labels for work it still calls SEO.
Which one should you use?
Whichever your team already says. If you are searching for tools or advice, try both, because vendors and agencies have not settled on one.
What matters is the outcome: AI visibility. The name on the invoice is a detail.
Where to go next
Sources
- The rise of answer engine optimization: why voice search matters. Search Engine Watch, Feb 7, 2018
- Guide to optimizing for generative AI features (updated July 10, 2026). Google Search Central
Questions marketers ask
Is AEO different from GEO?
Not in any way that changes what you do. Both mean being named, and described accurately, when someone asks a machine for an answer.
Is AEO the same as optimizing for featured snippets?
That is where the term started. Today it also covers AI assistants such as ChatGPT, Claude and Perplexity, and the AI summaries in Google.