Open Rates: Measure the percentage of recipients who open your email. This metric helps gauge the effectiveness of your subject lines. Click-Through Rates (CTR): Track the number of recipients who click on links within your email. This indicates how well your content and CTAs are performing. Conversion Rates: Assess the percentage of recipients who take the desired action, such as making a purchase or filling out a form. Bounce Rates: Monitor the percentage of emails that were not delivered. High bounce rates can indicate issues with your email list quality. Unsubscribe Rates: Keep an eye on how many recipients opt-out of your emails. This can signal dissatisfaction with your content or frequency of emails.