When a user visits a webpage, the publisher's website sends a request to the ad server. The ad server evaluates targeting criteria and selects the most relevant ad from its inventory. Think of a DSP as an Ligne with which you can manage année ad campaign across multiple ad servers. https://rtb-ench-res-en-temps-r-e21853.buyoutblog.com/28277763/un-impartiale-vue-de-sécurité-publicitaire