Share of Voice (SOV)

What SOV actually means

Share of voice measures how much of the available attention in a category a brand occupies. The definition depends on the surface: share of paid impressions in media, share of ranking positions in organic search, and increasingly share of citations in AI generated answers. The last of these is the newest and the one most companies are not yet measuring, which is exactly why it is worth measuring.

Worked example

A brand appears in 18 percent of the search results across its 200 priority commercial keywords while its largest competitor appears in 34 percent. In AI assistant answers to the same questions, the brand is cited in 9 percent of responses and the competitor in 41 percent. The organic gap is a two year project. The citation gap is the one that compounds fastest.

Why the board cares

Share of voice is the leading indicator boards use to check whether market position is improving before market share actually moves. It also reframes brand investment as a measurable position rather than an act of faith, which is why AI search and GEO work now appears in board decks that never previously discussed search at all.

Common mistakes

• Measuring share of voice on a keyword set chosen because the brand already ranks well for it.
• Ignoring AI assistant citations, which are becoming a primary discovery surface for commercial research.
• Treating share of voice as a goal in itself rather than a leading indicator of share of market.

Related terms

• Marketing Mix Modeling (MMM)
• Cost Per Click (CPC)
• TAM, SAM and SOM
• Multi-Touch Attribution (MTA)

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