When conducting a comparative analysis in email marketing, several key metrics should be evaluated: - Open Rate: This measures the percentage of recipients who open your email. It helps determine the effectiveness of your subject lines. - Click-Through Rate (CTR): This indicates the percentage of recipients who clicked on a link within your email, showing how engaging your content is. - Conversion Rate: This measures the percentage of recipients who completed a desired action (e.g., making a purchase), indicating the overall effectiveness of your campaign. - Bounce Rate: This shows the percentage of emails that were not delivered successfully, which could indicate issues with your email list quality. - Unsubscribe Rate: This indicates the percentage of recipients who opt-out of your email list, helping you understand if your content is resonating with your audience.