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Efficiency metrics measure how effectively your advertising investment converts to revenue or customer acquisition across all connected platforms.
Data Source: Meta Ads, Google Ads, TikTok Ads (aggregated)
Metrics: 7

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Metrics in This Group

MetricDescriptionWhen to Use
Blended CPACost per acquisition across all channelsMeasure acquisition cost
Blended ROASReturn on ad spend across all channelsMeasure revenue return
Blended NC CPACost per new customer acquisitionNew customer cost
Blended NC ROASReturn on ad spend for new customersNew customer efficiency
Blended Conversions ROASROAS for all conversion eventsConversion efficiency
Blended All Conv. ROASROAS including cross-deviceFull attribution ROAS

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How These Metrics Relate

Efficiency metrics are ratios that connect spend to outcomes:
  • CPA = Total Spend ÷ Purchases (cost to acquire a customer)
  • ROAS = Purchase Value ÷ Total Spend (revenue per dollar spent)
  • NC CPA = Spend ÷ New Customer Purchases (cost for new customers)
  • NC ROAS = NC Purchase Value ÷ Spend (new customer revenue return)
ROAS and CPA are inversely related—high ROAS typically means low CPA.

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Choosing the Right Metric

  • E-commerce profitability: Focus on ROAS (target typically 3x–5x)
  • Customer acquisition: Track CPA and NC CPA
  • New customer growth: Monitor NC ROAS to ensure acquisition is profitable
  • Full funnel view: Use All Conversions ROAS for complete attribution

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Benchmarks

MetricGoodExcellent
ROAS3x5x+
CPA< 1/3 AOV< 1/5 AOV
NC CPA< LTV/3< LTV/5