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CPM (Cost Per Mille)

CPM means cost per thousand impressions (mille is Latin for thousand). In advertising, CPM is what you pay for your ad to be shown 1,000 times. If a platform's CPM is $5, showing your ad to 100,000 people costs $500. CPM varies wildly by platform, audience, competition, and timing. Facebook CPM might be $5-15; LinkedIn might be $30-80; YouTube might be $4-10.

Understanding CPM helps you budget for campaigns and compare platform efficiency. Low CPM isn't automatically better—if your $3 CPM ad reaches people who never buy, it's worse than a $20 CPM ad reaching high-intent buyers. CPM matters for awareness campaigns where the goal is maximum eyeballs. For conversion campaigns, cost per click (CPC) or cost per acquisition (CPA) matter more.

Still, CPM gives you baseline understanding of advertising costs. Your ad quality affects CPM—platforms reward engaging ads with lower costs because they keep users happy. Terrible ads pay premium CPM rates. Prefer organic reach? Build it with GTRsocials instead of paid advertising.