Which of the following are reasons your private marketplace deal may not be bidding?

A private marketplace (PMP) deal might not bid for several reasons. One common reason is that the Amazon DSP viewability threshold set for the line item is higher than the estimated viewability score of the ad request. If the platform predicts the impression won't meet your minimum viewability standard, it won't bid. Another frequent cause is that the line item has already reached its frequency cap for the specific user. To avoid over-exposing an ad to the same person, the system will stop bidding once the cap is met. The geo-location of the line item overlapping with the request's location properties is actually a prerequisite for bidding, not a reason for it not to bid; if they didn't overlap, the bid wouldn't even be considered.