This document outlines metrics that can be used to measure email marketing campaign success, including delivery rate, open rate, click rate, and click-to-open rate. It discusses how to interpret these metrics and provides tips on improving rates. For example, removing invalid addresses can boost delivery rates while testing subject lines and content can increase open rates. Segmenting lists and adding clear calls-to-action are also recommended to increase clicks. Tracking these basic metrics over time allows marketers to optimize campaigns and measure return on investment.