Open Rate: Indicates how many recipients open your emails. A higher open rate suggests that your subject lines and sender names are effective. Click-Through Rate (CTR): Measures how many recipients clicked on links within your email. A higher CTR indicates that your content and calls-to-action are compelling. Conversion Rate: Tracks the number of recipients who take a desired action after clicking through your email. This is a critical measure of the effectiveness of your email marketing campaigns. Unsubscribe Rate: Helps gauge whether your email frequency or content is driving subscribers away. A high unsubscribe rate can indicate a need for content adjustment.