The DMP became central to audience targeting in the third-party-cookie era. As browser restrictions, consent requirements, and privacy law tightened, its role shrank and first-party approaches such as CDPs and data clean rooms moved closer to the center of the stack. Even though Chrome ultimately kept third-party cookies in 2025, the DMP’s anonymous-audience model had already lost the center to first-party, customer-level data.

In practice

A DMP is not a customer database in the CDP sense; it thinks in anonymous segments, not persistent people. If a vendor pitches a DMP as your customer-data foundation today, check whether you actually need first-party, customer-level data instead.