Share of voice is a marketing term. Share of voice measures the percentage of media spending by a company compared to the total media expenditure for the product, service, or category in the market. So, what? Well, here is the so what. It has been shown, by actual, evidence based research, that the larger the share of voice of any given company the larger its market share turns out to be. Now, let’s substitute a few words in our understanding of share of voice and see what that can tell us.