Meridian: Making Marketing Mix Modeling More Accessible
Google's recent release of Meridian, an open-source marketing mix modeling (MMM) framework, is making advanced marketing budget allocation more accessible than ever before. This powerful tool helps marketers move beyond the limitations of traditional attribution in today's privacy-first world.

What's MMM and Why Does It Matter Now?
Marketing mix modeling helps answer three critical questions that every marketer faces:
- How much do different marketing channels actually contribute to sales?
- What's the real ROI for each channel?
- Where should we shift our budget for better results?
As third-party cookies disappear and privacy regulations tighten, MMM is becoming essential rather than optional. Unlike traditional attribution, it doesn't rely on tracking individual users, making it future-proof in our privacy-conscious environment.
How Meridian Makes a Difference
Meridian stands out by making sophisticated statistical analysis accessible for marketing measurement. The framework:
- Separates baseline sales (what would happen with no marketing) from incremental sales
- Measures the true impact of each marketing channel
- Accounts for external factors like seasonality or economic trends
- Provides clear visualizations for easier decision-making
- Delivers specific budget reallocation recommendations

Seeing Through the Attribution Fog
The reality of modern marketing is complex. Customers interact with multiple channels before purchasing, making it difficult to determine which touchpoints truly influence decisions.
Meridian cuts through this fog by looking at the bigger picture. Instead of tracking individual journeys, it analyses how changes in channel investment correlate with changes in business outcomes, while accounting for other factors.
This approach often reveals surprising insights. Channels that appear highly effective in traditional attribution might actually just be capturing customers who would have purchased anyway. Meanwhile, channels that seem less impressive might be creating new demand that drives overall growth.

Practical Applications
When implemented effectively, Meridian can help marketers:
- Identify undervalued channels that deserve more investment
- Recognize diminishing returns in overfunded channels
- Quantify the true incremental value of marketing activities
- Make more confident budget allocation decisions
- Demonstrate marketing's contribution to the bottom line
The framework's recommendations are specific and actionable: "Channel A should increase from 20% to 30% of budget, while Channel B should decrease from 35% to 25%." These aren't vague suggestions—they're data-driven recommendations designed to improve your bottom line.
The Bigger Picture
What's particularly exciting about tools like Meridian (and Facebook's similar offering, Robyn) is how they're democratizing access to sophisticated marketing measurement. Capabilities that once required specialized expertise are becoming more accessible to marketing teams of all sizes.
As the industry continues to navigate a future with less user-level data, MMM represents one of the most promising approaches for maintaining marketing effectiveness. For marketers who embrace these methods, there's an opportunity to gain a significant advantage in making smarter, more effective budget decisions.
That's something worth exploring—even if you never need to understand the statistical engine running behind the scenes.