Lost Impression Share Budget: What It Is, Key Features, Benefits, Use Cases, and How It Fits in SEM / Paid Search
Lost Impression Share Budget is one of the most practical visibility metrics in **Paid Marketing** because it quantifies how often your ads *could* have shown but didn’t—specifically due to budget limitations. In **SEM / Paid Search**, where demand is captured moment-by-moment through auctions, this metric helps you separate “we chose not to spend” from “we wanted to spend, but the budget ran out.”