ROAS (Return on Ad Spend) is a fundamental metric that measures the ratio between revenue generated by advertising and its cost. It is an excellent starting point for evaluating the overall effectiveness of your advertising spend.
But to truly maximize every euro invested, it is essential to go beyond this high-level view. That is where mROAS (marginal ROAS) comes in.
A More Refined Performance Measure
mROAS evaluates the revenue generated by each additional euro invested in a specific marketing channel. In other words, it answers the question:
"How much does the next euro invested in this channel bring me?"
This more granular approach is essential for guiding your budget decisions strategically.
The Three Key Benefits of mROAS
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Complementing traditional ROAS:
ROAS shows what worked, mROAS reveals where to invest more to maximize future returns. It helps identify high-growth-potential channels, even when overall returns seem to be plateauing.
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Analyzing channel saturation:
mROAS quantifies the points of diminishing returns and helps you determine the optimal moment to reallocate your budgets toward higher-performing levers.
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Optimizing budget allocation:
By relying on concrete data, mROAS guides you to shift your investments toward channels offering the best marginal growth, thereby maximizing the overall ROI of your campaigns.
mROAS Integrated into the mediaROI Platform
The mROAS calculation is natively integrated into the mediaROI platform. This feature allows you to measure mROAS for a specific period (for example, the second quarter of 2025), even if the MMM model was trained over a longer timeframe.
This analytical flexibility delivers even more relevant budget recommendations, based on the most recent performance of your campaigns.
With mROAS, every investment decision becomes a performance lever.