AI & AEO

AI Overview Trigger Rate

Quick Definition

AI Overview trigger rate is the percentage of queries in a defined set (commercial-intent, informational, etc.) for which Google's AI Overview module appears above the classical organic results.

In context

Trigger rate varies sharply by query type: informational and how-to queries trigger AI Overviews most often; navigational and brand queries rarely. Trigger rate is rising over time but with periodic Google-led pullbacks for sensitive verticals (YMYL, medical, financial). Measurement: probe a representative query set monthly via incognito or rank-tracker tools that report AIO presence. Use trigger rate to size the AEO opportunity and prioritise pages.

Example

Across Canadian commercial intent queries we monitor, AI Overview trigger rate has been climbing through 2025–2026 with notable variance by vertical (Toronto SEO portfolio observation, 2026).

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Related terms

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ChatGPT Search

ChatGPT Search is OpenAI's web search feature that lets ChatGPT pull current information from the web with citations.

Hallucination Defense

Hallucination defense refers to the editorial and structural patterns that reduce the chance an AI engine will invent or misattribute facts about your brand.

RAG (Retrieval-Augmented Generation)

RAG combines a language model with a search system that retrieves relevant documents to ground the model's responses in current factual content.

Semantic Search

Semantic search is search that interprets the intent and contextual meaning of a query rather than matching only literal keywords — the dominant search paradigm since BERT (2019).

GEO (Generative Engine Optimization)

GEO is another name for AEO — optimizing content for generative AI search engines.

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