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Measurement Just Got Easier to Build. What You Should Accept From Your Agency.
In September 2026, Google upgraded Meridian, its free, open-source marketing mix modeling tool, with AI-guided model-building, upper-funnel brand signals for channels like TV and out-of-home, and globally available causal geo-testing. The upgrade lowers the technical bar for building an independent measurement model outside your agency’s reporting — which means “we don’t have the resources to…








