Glossary/Measurement & Attribution/Bayesian MMM
Measurement & Attribution
Bayesian MMM
A marketing mix model that combines prior beliefs with observed data to produce probability distributions, rather than single point estimates, for channel effects.
By Brandon Mina·CEO, BrandPilot AI·Updated November 2026
Short answer
Bayesian MMM is a marketing mix model that combines prior beliefs, such as expected channel effects from past studies or experiments, with observed data. Instead of single point estimates, it produces probability distributions for each channel's impact, making uncertainty explicit and allowing results from lift tests to be incorporated as priors.