A tool that provides a quantitative measure of the effectiveness of email marketing campaigns by determining the percentage of recipients who opened a particular email. The result is derived by dividing the number of unique email opens by the number of emails sent, excluding bounces. For example, if 100 emails are sent and 20 are opened, the resulting metric would be 20%.
This metric offers vital insights into audience engagement and the success of subject lines, sender reputation, and timing of email deployments. Historically, monitoring this figure has allowed marketers to adapt their strategies for improved performance, leading to increased conversions and stronger customer relationships. Its consistent tracking facilitates informed decisions on content optimization and audience segmentation.