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Auction

Comparing bids for one impression and picking the winner.

First-price auctions clear at the winning bid. Second-price auctions clear at the second bid plus an increment. Most programmatic is first-price today, which makes floors the publisher’s main lever.

$14.2Bidder Awins · pays 14.20$11.5Bidder B2nd price: 11.51$9Bidder C
First price clears at the winning bid. Second price clears at the runner-up plus an increment. Most programmatic is first price.