Lost Impression Share Rank: What It Is, Key Features, Benefits, Use Cases, and How It Fits in SEM / Paid Search
Lost Impression Share Rank is one of the most practical diagnostics in **Paid Marketing** because it answers a blunt question: *How often could you have shown an ad, but didn’t—because you weren’t competitive enough in the auction?* In **SEM / Paid Search**, that “competitiveness” is usually driven by a mix of bid, ad quality, relevance, and landing page experience.