Sign inBook a setup callStart tracking
Product
Product overviewHow it worksLive demoFree tools
Product
DashboardsClient reportsAutomationsProfilesAssistant
By what you run
Online storeServices and leadsCreatorsAgencies
Platforms
Meta adsGoogle AdsTikTokInstagramEmailSMS
Resources
DocsGuidesGlossaryWalkthroughsEvents APICompareSecurity
PricingSign in
Start trackingBook a setup call

Glossary

MER

Also called marketing efficiency ratio, blended ROAS.

Marketing efficiency ratio: total revenue divided by total marketing spend.

MER = total revenue ÷ total marketing spend, both for the same period. It is sometimes called blended ROAS, though some teams count only ad spend in blended ROAS and all marketing costs in MER.

Because the revenue comes from your store or payment system, each sale is counted once, whatever channels touched it. That makes MER the honest headline number for "is our marketing paying overall?", while platform ROAS stays useful for comparing campaigns inside one platform. See ROAS, blended ROAS and MER.

Related terms

Meta ads vs Shopify: why purchases don't matchMeta Ads Manager shows more (or fewer) purchases than Shopify. The six causes, how to measure your own gap, and which number to use for budget calls.Tracking accuracy · 5 min readAttribution models explained, with one buyer's path worked throughFirst touch, last click, linear, position-based and data-driven attribution, worked through on one buyer path. What each model is good for, and its limits.Attribution · 5 min readROAS, blended ROAS and MER: which one to run the business onFormulas for ROAS, blended ROAS, MER and break-even ROAS, a worked example, and why adding up each platform's ROAS overstates what your ads earn.Attribution · 4 min read

All 58 terms · Spotted a mistake? Email hello@sporetag.com.