Cost per Impression (CPM)
A common internet marketing cost structure, especially for banner advertising. You agree to pay a set cost for every 1,000 Impressions your ad receives. Search engine marketing may involve CPM costs for Contextual Advertising. This internet advertising pay structure should really be called Cost per 1,000 Impressions, but it generally gets shortened because the idea remains the same, the concept being that of paying for impressions.