AI systems · Metric
AI visibility
Also known as: Citation share, Share of model
What is Citation share?
AI visibility is the share of sampled AI-assistant answers, across a defined prompt set, that mention or cite a brand.
Because generative answers are stochastic, a single query proves nothing. Visibility is measured by running a prompt set repeatedly across assistants and reporting mention rate, citation rate, position and sentiment with the sample size attached.
Related entities
- Zero-click searchZero-click search is a search that ends on the results page — answered by a snippet, map, panel or AI summary — without a click to any website.
- YouTubeYouTube is Google's video platform, used by 83% of U.S. adults, and in Ahrefs' 2025 data the strongest correlate of brand visibility in AI assistants.
- Generative Engine OptimizationGenerative Engine Optimization (GEO) is the work of making a brand one of the sources a generative AI assistant names and cites when it composes an answer.
- ProfoundProfound is an AI-visibility platform that monitors how brands appear in answers from assistants such as ChatGPT, Perplexity, Gemini and Google AI Overviews.
- Brand mentionsBrand mentions are references to a brand's name across the web — linked or not — and they are the strongest measured correlate of being named by AI assistants.
Field notes covering Citation share
- Brand Mentions Are the New BacklinksAcross 75,000 brands, web mentions correlated three times more strongly with AI visibility than backlinks. What that means, where to earn mentions, and how to track them.
- How to Measure AI Visibility Without Lying to YourselfWhat platforms like Profound measure, why one answer proves nothing, and the KPI stack that turns probabilistic mentions and citations into defensible evidence.
- Zero-Click Search: What to Measure When Nobody Clicks58.5% of U.S. Google searches end without an open-web click, and AI summaries halve click rates. The metrics that replace sessions and rank.
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