There are several key metrics used to measure engagement levels in email marketing:
Open Rate: The percentage of recipients who open your email. Click-Through Rate (CTR): The percentage of recipients who click on one or more links in your email. Conversion Rate: The percentage of recipients who complete a desired action, such as making a purchase. Bounce Rate: The percentage of emails that could not be delivered to the recipient's inbox. Unsubscribe Rate: The percentage of recipients who opt out of your email list.