Open Rate: The percentage of recipients who open the email. Click-Through Rate: The percentage of recipients who click on a link within the email. Conversion Rate: The percentage of recipients who complete the desired action, such as making a purchase or signing up for a service. Return on Investment (ROI): The overall profitability of the email campaign relative to its cost. Customer Lifetime Value (CLV): The total revenue generated from a customer throughout their relationship with the business.