Four KPIs to monitor for email campaigns

Executive overview

Most email marketers track the wrong things or too many things. Four metrics give a complete picture of campaign performance: open rate, click-through rate, conversion rate, and average sales price.

Track all four together — each metric diagnoses a different failure point in the email funnel.

The four KPIs

  1. Unique open rate — percentage of delivered emails that were opened; measures subject line effectiveness
  2. Click-through rate — percentage of recipients who clicked at least one link; measures body copy and CTA strength
  3. Conversion rate — number of conversions divided by delivered emails; measures end-to-end campaign effectiveness
  4. Average sales price — total revenue divided by conversions; reveals whether content drives buyers toward higher- or lower-priced products

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