Email churn rate refers to the percentage of email subscribers who have unsubscribed or stopped engaging with a company’s email communications over a specific period of time. This metric is used to measure the effectiveness of an email marketing campaign and can indicate the level of customer satisfaction and loyalty. A high email churn rate may suggest that the content or frequency of emails is not resonating with subscribers, while a low churn rate indicates a strong and engaged subscriber base. Monitoring and analyzing email churn rate can help businesses improve their email marketing strategies and retain valuable subscribers.