The churn rate is the Rate at which customers unsubscribe from emails or stop doing business with an entity. It also tells about the frequency at which your customer's list grows after multiple unsubscribes, rough bounces, and complaints. It is observed that the average churn rate is 25% per year which means that 25% of the customers are unsubscribing and leaving the company every year. The Rate suggests that the company needs to acquire 25% more customers to fill in the gap. Hence, your answer will be complete with some suggestions to cover and study the churn rate.