Retargeting

CPM (cost per mille) is what you pay for one thousand ad impressions. Compute it as media spend divided by impressions, times 1,000. Advertisers use it to compare the cost of delivery on paid media across Display, video, Connected TV (CTV), and social, including Facebook and Google buys. CPM measures

Behavioral targeting selects ads using observed actions, such as site visits, app events, searches, or purchases, rather than the page topic alone. The signal is only useful when you can name where it came from, whether it may be used for ads, how recent it is, and when it expires.