CPM (cost per mille)
Definition
What advertisers pay per 1,000 ad impressions on your videos — a key driver of YouTube ad income that varies widely by niche.
CPM is the amount advertisers pay per 1,000 ad impressions. It varies enormously by niche — finance and business command high CPMs, entertainment far less — which is why niche choice shapes a channel's earning ceiling.
CPM is what advertisers pay; RPM is what *you* actually keep after YouTube's share. See how much faceless channels make.