Process Flow
Animated overview of the full workflow
TL;DR
CPA (Cost Per Acquisition) measures cost per conversion regardless of type. CPL (Cost Per Lead) specifically measures cost per lead. ROAS (Return on Ad Spend) measures revenue generated per dollar spent. Use CPL for lead generation, ROAS for e-commerce, and CPA as a general efficiency metric. The best metric depends on your business model and conversion funnel.
CPA: Total ad cost divided by total conversions. Works for any conversion type. CPL: Total ad cost divided by leads generated. Specific to lead generation. ROAS: Total revenue divided by ad spend. E-commerce focused.
Step-by-Step Guide
Follow these 2 steps to complete this guide
- 1
When to Use Each
**Lead gen businesses:** Track CPL as your primary metric. Also track cost per qualified lead and cost per closed deal for full funnel visibility. **E-commerce:** Track ROAS as your primary metric. Also track CPA for purchase events and average order value. **SaaS/subscriptions:** Track CPA for sign-ups plus customer lifetime value (LTV) to understand true ROI.
- 2
The Danger of Single Metrics
No single metric tells the full story. Low CPL is useless if leads are low quality. High ROAS might mask declining volume. Always pair efficiency metrics (CPA, CPL, ROAS) with volume metrics (total conversions, total revenue).
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