Share of AI Voice
In one line
Share of AI Voice is the combined share of mentions and citations your brand earns inside a category's AI answers — the closest thing GEO has to a market-share metric.
Going deeper
Share of AI Voice extends the classic advertising idea of share of voice into AI search. Instead of looking at citation rate or mentions alone, you total your brand's mentions and citations across, say, 100 category prompts and compare against competitors.
What makes it appealing is that it gives leadership a single sentence about market position. Tracked quarterly, it separates campaigns that move category share on AI surfaces from campaigns that spike on a couple of keywords and fade.
Definitions vary by vendor and team. Some count citations only, others count mentions plus citations. When reading external benchmarks, check the definition first, and inside your own dashboards keep the definition stable so trends remain comparable.
Related terms
Share of Voice
Share of voice in AI search is the proportion of category-level answers in which your brand appears, compared with competitors.
GEO·AEOCitation Rate
Citation rate is the share of a defined prompt set in which an AI answer cites your brand or domain — the headline KPI of GEO.
GEO·AEOAnswer Coverage
Answer coverage is the percentage of a defined target prompt set in which your brand shows up at least once inside the AI answer.
GEO·AEOBrand Mention
A brand mention is any time your brand name appears as text inside an AI answer — separate from whether your domain is in the source list, but still a unit of exposure.
GEO·AEOGEO
GEO (Generative Engine Optimization) is the practice of optimizing content and data so that a brand gets cited and recommended inside generative AI search answers like ChatGPT, Perplexity and Google AI Overviews.
How does your brand show up in AI answers?
Villion measures how your brand appears across ChatGPT, Perplexity and AI Overviews, then automates the work that lifts citation rate and share of voice.
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