High turnover can be measured using various metrics:
Unsubscribe Rate: The percentage of subscribers who opt out of your list after receiving an email. Bounce Rate: The percentage of emails that couldn't be delivered to the recipient's inbox. Open Rate: The percentage of subscribers who open your emails, indicating initial engagement. Click-Through Rate (CTR): The percentage of subscribers who click on links within your emails, showing deeper engagement. Conversion Rate: The percentage of subscribers who take the desired action after clicking through your email.