Search Impression Share

Search Impression Share is a specific Google Ads metric that divides the number of impressions an ad actually received on the Search Network by the estimated number of impressions it was eligible to receive. It is the definitive metric for identifying missed revenue opportunities in a paid campaign. If a highly profitable keyword has a Search Impression Share of only 20% due to budget constraints, the brand is literally leaving money on the table. For SEO strategy, this metric highlights exactly which keywords the brand must prioritize ranking for organically, as the paid budget is insufficient to capture the total available market demand.

Search Impression Share Simplified

Search Impression Share tells you exactly how many potential customers you are missing out on. If 1,000 people search for your product, but your ad only shows up 200 times because your budget is too small, your Search Impression Share is 20%, meaning you just lost 800 potential sales to your competitors.