Measuring the usability of your emails can be done through various metrics:
Open Rates: Indicates how many recipients opened your email. Click-Through Rates (CTR): Shows how many recipients clicked on links within your email. Conversion Rates: Measures how many recipients took the desired action, such as making a purchase. Bounce Rates: Indicates how many emails were not successfully delivered. Unsubscribe Rates: Shows how many recipients opted out of receiving future emails.