Cost Per Mille (CPM), or cost per thousand impressions, is a pricing model where advertisers pay a fixed amount for every thousand times an ad is displayed. CPM is often used in brand awareness campaigns, as it focuses on reach rather than direct engagement.

CPM campaigns provide predictability in budgeting, as costs are based on impressions rather than clicks. By focusing on CPM, advertisers can achieve broad exposure, building brand recognition and visibility among large audiences.