KnowledgeMarketing Efficiency Ratio
MER · How much total business revenue is generated for every unit spent on marketing.
Understand MER in context.
Simply explained explanation
How much total business revenue is generated for every unit spent on marketing.
Professional explanation
Blended business-level revenue divided by aggregate marketing investment over the same period.
Analytical explanation
Useful as a guardrail against platform double attribution. Track new-customer contribution, organic demand and seasonality rather than assuming causality.
Technical explanation
MER = total defined business revenue / total defined marketing spend. Include all agreed paid-media costs and optionally agency/creative costs, but document the scope.
Four complementary explanations — choose your level. Technical definitions are platform-specific where noted.
↗ How to use it
Monitor beside contribution margin and new-customer acquisition.
⚠ Common interpretation mistake
MER is not campaign ROAS or a causal incrementality estimate.
Metric calculator
Adjust the inputs to see how the metric is calculated.