When you run a model in MMM Pilot, you aren’t just drawing a straight line through your data. You are tuning a sophisticated engine. The knobs and dials on this engine are called Hyperparameters.
These settings control how the Robyn framework interprets reality. While MMM Pilot automates much of this, understanding three key concepts will help you read your results like a pro.
1. Adstock: The “Memory” Effect
Ads don’t disappear the second you stop paying for them. If you see a TV commercial today, you might remember it and buy the product three days later. This lingering effect is called Adstock.
- The Decay: Think of it like a radioactive half-life. MMM Pilot calculates this to show you how much of today’s sales are actually powered by last week’s marketing spend.
- The Benefit: This helps you understand the long-term value of your brand building, rather than just immediate clicks.
2. Saturation: The “Sponge” Effect
Imagine pouring water onto a sponge. At first, it soaks up everything. But eventually, the sponge gets full, and the water just spills over. Marketing works the same way. This is Saturation, also known as Diminishing Returns.
- The Curve: In the beginning, every dollar you spend brings in new customers.
- The Ceiling: Eventually, you reach everyone in your target audience. Spending more money at this point won’t bring more sales; it just makes your Cost Per Acquisition (CPA) more expensive.
- The Goal: MMM Pilot helps you find the sweet spot—spending just enough to fill the sponge without wasting water.
3. Alpha & Gamma: The Shape of the Curve
To model these effects mathematically, Robyn uses specific settings called Alpha and Gamma. You don’t need to be a mathematician to understand them:
- Alpha (The Curve): This controls how quickly diminishing returns kick in. A high Alpha means you hit the ceiling very fast; a low Alpha means you can keep spending efficiently for a long time.
- Gamma (The Delay): This controls the timing. It determines when the peak impact of an ad happens. Does the ad work immediately (Sales/Performance marketing), or does it take time to build up (Brand marketing)?
Continuous Improvement
MMM Pilot isn’t a “set it and forget it” tool. It features an Optimization Loop. After a run, the system (assisted by AI) can analyze which hyperparameters worked best and suggest new ranges for your next run. This allows your model to “learn” and become more accurate over time.