Advertisers’ bids are sent to ad exchanges, which select the winner of the auction. The final winner is selected at SSP rein case the bid request welches sent to more than one ad exchange. RTB ecosystem consists of several types of parties that typically participate in the RTB process (see https://geotargeting82581.angelinsblog.com/27753166/neue-schritt-für-schritt-karte-für-werbeautomatisierung