01 / THE DEFINITION
CPM (Cost Per Mille), explained.
CPM is the advertiser-side rate before YouTube's split. Your RPM is always lower than your CPM.
02 / THE CONTEXT
Why it matters for growth
High-CPM niches (finance, B2B, tech) can monetize at a fraction of the views a low-CPM niche needs. It shapes which niche is worth your time.