Search Impression Share: What It Is, Key Features, Benefits, Use Cases, and How It Fits in SEM / Paid Search
Search Impression Share is one of the most useful “coverage” metrics in Paid Marketing because it tells you how often your ads showed compared to how often they *could* have shown. In SEM / Paid Search, it’s the closest thing to a market-availability indicator: are you present when demand exists, or are competitors taking those opportunities?