Glossary
What is Segmented floors?
Also called: segment floors, floor segmentation
Segmented floors set different minimum prices for different slices of inventory, such as country, device, size or time of day, instead of one floor.
हिंदी में पढ़ेंBids for a US desktop 300×600 at lunchtime look nothing like bids for a mobile banner in India at 3 a.m. A single floor set for one segment can leave another almost unsold, or let it sell far too cheaply. Segmented floors set the minimum price per slice of inventory, based on your own bid data.
Both main tools support it. Google Ad Manager pricing rules can be scoped by inventory, size and creative type; if two rules match, the higher price applies, and floors are compared with the bid after Google’s revenue share. Since December 2025 a rule can also set floors for specific bidders. Prebid’s Price Floors module can set floors by ad unit, size and media type, and dynamic floors from a provider update the values from fresh bid data.
Judge floors on revenue, not CPM. A higher floor raises the average CPM but sells fewer impressions, and revenue per 1,000 requests is fill × average CPM. Change one floor at a time and compare revenue and fill before and after.
Example
One segment gets 100,000 requests. At a $1.00 floor, 80% fill at a $1.50 average CPM: 100,000 × 0.8 × $1.50 ÷ 1,000 = $120. At a $2.00 floor, 40% fill at $2.40: $96. The higher floor lifts CPM but earns $24 less.
Why it matters to publishers
One floor for everything leaves money on the table somewhere. Segmenting by real bid data lets each slice of inventory sell at a price it can actually reach.