In-app, bidding is where the ad space is bought by the highest bidding advertiser. In-app, bidding is relatively a new bidding method. In-app bidding can also be automated. These bidding can happen in real-time through open exchanges and private marketplace. The publisher sets the floor price.
Advertisers can utilize the audience data to determine whether the ad space on offer is relevant to their campaign. They can purchase the space in real-time and bid on it instantly. The advertiser with the highest bid will acquire the ad space to display their ads. These decisions can either be manual or automatically by algorithms.