User Visits a Site: When a user visits the publisher’s site, the SSP generates a bid request that includes information about the ad space and anonymized data about the user, such as location, device type, and browsing history. Costs: The costs charged by a DSP for its services vary significantly. https://funny-lists.com/story18462755/5-fatti-facile-circa-pubblicit%C3%A0-digitale-descritto