What is share of voice?

The idea started in advertising, where share of voice meant a brand’s slice of the industry’s ad spend or impressions. As earned and organic channels took over, the definition widened: in modern marketing it usually means a brand’s share of the mentions and engagement across social media, news, and forums, sometimes weighted by reach.

The math is simple: divide one brand’s mentions, impressions, or engagement by the tracked set total, your brand included. Everything hard lives in the inputs. Which platforms count, whether a viral TikTok weighs the same as a post with ten views, and how you treat mentions that never name the brand all change the number. That is why share of voice is most useful as a trend you measure consistently over time, not as a single figure quoted in isolation.

Practitioners watch it because it tends to lead other metrics: sustained gains usually show up before gains in awareness and market share, and a sudden drop is often the first visible sign of a competitor’s campaign landing. The measurement is now extending to AI answers: how often ChatGPT or Perplexity names a brand when buyers ask about the field. A 2026 behavioral study by Profound found that brands consumers chose appeared roughly twice as often in AI answers as brands they passed over, which makes AI share of voice a series worth tracking alongside the social and paid ones.

How this shows up in Waldo

Waldo computes share of voice from tracked category data: one snapshot call returns each brand’s share of the conversation alongside top angles and trending topics, over the API or inside Claude via the MCP server. Because the underlying posts are retained, you can move from the percentage down to the verbatims behind it in one step, and the daily refresh cycle makes the trendline consistent enough to act on.

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