Ep 3: Price granularity, the buckets that decide your pay

A bid of two dollars eighty-seven can arrive as two dollars fifty.

Price granularity is the size of the price steps Prebid rounds bids into.

Your ad server can’t read every price, so Prebid sorts bids into buckets, always rounding down. The default, medium, uses ten-cent steps up to twenty dollars. So two eighty-seven becomes two eighty. Pick low, with fifty-cent steps, and it becomes two fifty. Now say AdX bids two sixty for the same view. Inside Google Ad Manager, two fifty loses to two sixty. You earn two sixty, not two eighty-seven. Rounding only affects that comparison. A winning Prebid bid still pays its real price. Finer steps need more line items, so many teams use custom steps, fine where bids cluster.

Today, check your Prebid granularity, and that your line items match it exactly.

Next, one line item per price bucket.