Open Rate: The percentage of recipients who open your email. This indicates the effectiveness of your subject lines and sender name. Click-Through Rate (CTR): The percentage of recipients who clicked on one or more links in your email. This helps gauge the relevance and appeal of your content. Bounce Rate: The percentage of emails that could not be delivered. High bounce rates can affect your sender reputation. Unsubscribe Rate: The percentage of recipients who opt out of your email list. This can indicate issues with content relevance or frequency. Conversion Rate: The percentage of recipients who completed a desired action, such as making a purchase or filling out a form.