Churn rate, commonly used in subscription-based businesses, measures the rate at which customers unsubscribe or stop using a service within a specific timeframe. It helps businesses understand customer retention and satisfaction, as a high churn rate indicates a loss of customers and potential issues with the service or product quality. Churn rate can be influenced by various factors, including customer experience, competition, price sensitivity, and market dynamics. It is typically calculated by dividing the number of customers lost during a specific period by the number of customers at the start of that period, then multiplying by 100 to get a percentage.