In between the advertiser and the publisher is the ad exchange. You can think of the ad exchange like a market with vendors and buyers. You ask for the media kit, choose the ad dimensions that fit your budget, and then buy the ad for a certain amount of time. https://jaredxqgui.newbigblog.com/34495516/o-fato-sobre-ad-tech-que-ninguém-está-sugerindo