It’s time to come clean – the complete data clean rooms guide

Data clean rooms are secure environments where two or more parties can collaborate on first-party data without exposing individual user details.
They emerged as a response to stricter privacy regulations (GDPR, CCPA, Apple's ATT) and the phase-out of third-party cookies.
By ingesting user-level data and outputting aggregated insights like audience cohorts, marketers can measure campaign performance, build granular audiences, optimize reach/frequency, and incrementality test.
Key providers include walled gardens (Google, Amazon, Meta), neutral players (Habu, SnowFlake), and MMPs.
Adoption is surging, with Gartner predicting 80% of large advertisers will use data clean rooms by 2023.
Challenges remain in cost, cross-platform integration, and data preparation.