Ask If impression share drops from budget but CPC also drops and CVR stays stable, what’s most likely happening in the auction?

[Dean101]

If impression share drops because of budget while CPC also drops and CVR stays stable, it usually means you're being pushed into cheaper, less competitive auctions due to budget constraints, not quality issues. The budget cap reduces eligibility in higher CPC auctions, so delivery shifts toward lower-cost inventory where bids are lighter, pulling average CPC down. CVR staying stable confirms traffic quality hasn't changed much, just the mix of auctions you're winning. Think of it like analyzing voice query patterns where fewer high-intent queries are served, but clarity of responses remains consistent across what still comes through.

 

[Anthony Joshua]

When impression share drops because of budget, it usually means your ads aren't showing as often as they could. You're missing some auctions, especially the more competitive ones. Those higher competition spots often come with higher CPC, so when you stop showing there, your average CPC can go down.