Glossary
Answer Engine
A search product that returns a direct synthesized answer instead of a list of links: Perplexity, ChatGPT Search, Google AI Overviews.
Definition
Answer engines combine LLMs with real-time retrieval to answer user questions in natural language, almost always with cited sources. They differ from chatbots in that they explicitly surface the sources behind each claim. They differ from traditional search in that the answer is the experience: links are supporting evidence, not the primary output.
Example
Perplexity is a pure answer engine: every response is a synthesized paragraph with numbered citations to the sources it used.
Related terms
AI Engine
A general term for the AI assistants and answer products that synthesize responses from multiple sources: ChatGPT, Gemini, Claude, Perplexity, Grok, Google AI Overviews and Google AI Mode.
Answer Engine Optimization (AEO)
The practice of optimizing your brand and content so that AI answer engines cite you when users ask direct questions.
Citation
A specific URL or source that an AI engine links to when supporting a claim in its answer.
AI Overviews
Google's AI-generated answer block that appears above traditional search results for many queries.
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