What is MER (Marketing efficiency ratio)?

Your blended ROAS across all marketing channels. Take total revenue and divide by total marketing spend. MER gives you a fuller picture than platform-reported ROAS because it accounts for attribution issues and multi-touch customer paths.

Last updated 2026-04-17

Your blended ROAS across all marketing channels. Take total revenue and divide by total marketing spend. MER gives you a fuller picture than platform-reported ROAS because it accounts for attribution issues and multi-touch customer paths.

Why MER matters: Platform ROAS numbers can be inflated by attribution overlap where multiple channels claim credit for the same conversion. MER shows your true efficiency.

Frequently Asked Questions

What is MER (Marketing efficiency ratio)?

Your blended ROAS across all marketing channels. Take total revenue and divide by total marketing spend. MER gives you a fuller picture than platform-reported ROAS because it accounts for attribution issues and multi-touch customer paths.