Bid floors set the minimum CPM you're willing to accept for your inventory. You can configure floors directly in the Sovrn platform at the ad tag level via the CPM Floor setting. If you're also passing a floor in your bid requests, Sovrn will honor whichever value is higher — so your most restrictive floor always takes precedence.
What's the right floor strategy?
Setting floors too high can suppress fill rate and leave revenue on the table. Setting them too low can undervalue your inventory. The goal is to find the threshold where you're maximizing revenue without meaningfully sacrificing fill.
A few principles to guide your approach:
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Start conservative. If you're setting floors for the first time, begin lower than you think you need to and adjust upward based on observed CPMs. It's easier to raise a floor than to recover lost demand relationships.
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Segment by placement. High-visibility placements (above the fold, interstitials, rewarded video) can support higher floors than low-visibility or remnant inventory. Applying a single floor across all tags leaves money on the table for your best placements.
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Monitor fill rate alongside CPM. A rising CPM paired with a falling fill rate is a signal your floor may be too aggressive. Look at both metrics together — not in isolation.
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Revisit floors regularly. Market CPMs shift seasonally, with Q4 typically commanding higher rates and Q1 softening. Floors that made sense in November may suppress fill in January.
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Avoid round numbers. Floors set at exactly $1.00, $2.00, etc. can be gamed by bidders who shade just below clean thresholds. Slightly irregular values (e.g., $1.15) can improve yield.
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