Understanding email campaign metrics is essential for measuring success: 1. Open Rate: Indicates how many recipients opened your email. 2. Click-Through Rate (CTR): Measures the percentage of recipients who clicked on a link in your email. 3. Conversion Rate: Tracks the percentage of recipients who completed a desired action. 4. Bounce Rate: Shows the percentage of emails that were not delivered. 5. Unsubscribe Rate: Indicates how many recipients opted out of your email list.