Glossary
What is Send all bids?
Also called: send all bids mode, enableSendAllBids
Send all bids is Prebid's default mode: it passes every bidder's price to the ad server, not just the top bid, using bidder-specific keys.
हिंदी में पढ़ेंIn top price mode, Prebid sends one set of key-values for the winning bid, and one set of line items covers every bidder. In send-all-bids mode, which is Prebid’s default, it also sends keys for each bidder, such as hb_pb_bidderA.
The benefit is reporting. Ad Manager can report on every bidder, including those that lost, so you can spot a partner that bids often but low. The cost is setup: each bidder needs its own set of line items, which multiplies the line item count.
Watch key name length. Ad Manager truncates key names longer than 20 characters, which quietly breaks targeting for bidders with long codes. Deals need care too: with top price, deal bids must be configured so they still reach the ad server. Whichever mode you use, the line items must match the keys Prebid actually sends.
Example
Three bidders answer with $2.80, $2.40 and $1.90. Top price sends only hb_pb=2.80. Send all bids also sends hb_pb_bidderA=2.80, hb_pb_bidderB=2.40 and hb_pb_bidderC=1.90.
Why it matters to publishers
Send all bids gives you the data to judge every partner, but only if the line items and key names are set up correctly.