Serve method options
When creating an assignment, there are two methods available to determine how the assignment will be served: fixed delivery and auction.
The fixed delivery method serves ads based on weight and quotas relative to other assignments. For more information on priority and weight, read Pacing & schedule.
The auction method submits a bid and will serve if it wins against other auction-based ads. The bids are entered as a cost per one thousand impressions (CPM).
In addition to competing against other direct sale ads, the auction method allows direct sale ads to compete against server-to-server and Open RTB auctions, maximizing the revenue potential of each impression.