Meridian is now available to everyone

Google's open-source MMM, Meridian, addresses critical gaps in traditional models by incorporating modern media like Search and AI-driven campaigns. Using Bayesian causal inference, it blends prior knowledge with real-world data to reveal true incremental impact. Key differentiators include:

- **Performance Media Insights**: Access to the MMM Data Platform with Google Search query volume provides a realistic view of paid search ROI, mitigating sales correlation biases.

- **Customization**: Full code transparency allows modification of parameters for specific business KPIs (sales, website visits, profit, conversions). Non-media variables like pricing and promotions can be included.

- **Reach & Frequency**: Unlike traditional impression-based video measurement, Meridian distinguishes between reach (unique viewers) and frequency (repetition), offering nuanced video impact analysis.

- **Experiment Integration**: Incrementality experiment results can be used as priors to calibrate models for real-world accuracy.

- **Partner Ecosystem**: Over 20 certified measurement partners (e.g., Analytic Edge) provide implementation support, best practices, and access to granular Google media data.

Actionable takeaways for ad ops: Reallocate budgets confidently using scenario optimization; validate MMM outputs with experiments; leverage open-source flexibility to align with business goals; and use reach/frequency metrics to optimize video ad effectiveness.