MARKETING GLOSSARY
Share of Voice: Definition, Measurement, and Strategy
DIRECT ANSWER
Share of Voice (SOV) is the percentage of total category advertising or content impressions that a brand owns relative to all competitors in the category. It is calculated as a brand's impressions (or spend, or mentions) divided by the total impressions across all category competitors. Higher SOV is consistently associated with sustained or growing market share.
SOV Across Channels
Paid SOV is measured by comparing your ad impressions or spend against total category spend — tools like Google Ads' Impression Share report provide this directly for search. Organic SOV tracks the share of non-branded keyword rankings your domain holds versus competitors. Social SOV measures branded mention volume relative to competitor mention volume.
Each channel's SOV is a distinct signal. A brand can have dominant paid SOV but minimal organic SOV if they rely on media budget rather than content authority. Long-term, organic and earned SOV are more defensible because they do not disappear when budgets are cut.
The SOV–Market Share Relationship
Research across multiple categories shows that brands with SOV above their market share tend to grow; brands below tend to shrink. This 'excess SOV' concept is a useful budget-setting heuristic — if you want to grow market share, you need to invest in SOV above your current share, not just proportionally to it.
Challenger brands in competitive categories can achieve disproportionate SOV by concentrating in a niche before expanding. Dominating a specific vertical, geography, or use case in search and content is more achievable than competing for broad-category SOV against incumbents with larger budgets.
FAQ
Share of Voice — common questions
How do we measure share of voice if we can't see competitor spend?
Use proxy metrics: organic keyword overlap tools (Ahrefs, Semrush) show keyword ranking share; social listening platforms measure mention share; Google Ads impression share shows your portion of available paid impressions. None is complete, but together they give a directional SOV picture.
Is SOV relevant for B2B companies?
Yes, though the channels differ. B2B SOV is most meaningfully tracked in organic search (ranking share for category keywords), industry publications and analyst coverage, and LinkedIn engagement share. Event and podcast presence also contribute to B2B SOV in many categories.
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