Share of voice is your brand's portion of the total market conversation or advertising presence in your category, relative to competitors. It can be measured across advertising, search, social, or, increasingly, mentions in AI-generated answers. A higher share of voice tends to correlate with a greater market share over time.

Share of voice matters more now than it did two years ago, because AI answer engines cite the brands mentioned most often across the web. The brands that earn consistent mentions get surfaced when buyers ask an AI for recommendations. Owning the conversation in your category increasingly determines whether you appear at the moment of consideration.

Example:

 If your category generated 10,000 relevant online mentions in a quarter and 1,500 referenced your brand, your share of voice is 15%.

How is share of voice measured?

 By comparing your brand's mentions, ad presence, or search visibility against the total in your category, expressed as a percentage.

Why does share of voice matter for AI search?

 AI answer engines tend to surface brands mentioned consistently across trusted sources, so a higher share of voice improves the odds of being cited in AI-generated answers.

Source: Ahrefs study of 75,000 brands on branded mentions and AI Overview visibility