Metrics > Email Open Rate Email Open Rate Definition: Email Open Rate measures the percentage of recipients who open an email.Formula: Open Rate = (Emails OpenedEmails Delivered)×100Why It Matters:A low open rate suggests ineffective subject lines or email timing. How to Improve: Optimize send time based on past open trends Personalize emails using recipient names A/B test subject lines Relevant Integrations: HubSpot Mailchimp Example Calculation:If 10,000 emails were delivered and 2,500 were opened, then:Open Rate= (250010000)×100 = 25%