Share of Voice vs Share of Market in Advertising
Share of Voice has two meanings. On a digital billboard, it's the percentage of loop time your ad gets on one screen. In marketing strategy, it's your percentage of all advertising in your category and market. Share of market is your percentage of category sales. Only the second meaning predicts growth. Key takeaways Rotation share of voice describes one screen. Marketing share of voice describes a whole market. Mixing them up leads to bad budget math. Any share-of-voice figure only means something once you know what total it's measured against. Seconds and spots mean rotation. Category spend means strategy. Share of voice is your slice of category advertising. Share of market is your slice of category sales. One predicts, the other reports. Excess share of voice is share of voice minus share of market, and sustained positive excess is linked to share gains in effectiveness research. You can estimate share of voice without agency tools by counting observable ad weight in a ...