Churn rate, also known as customer attrition rate, is a measure of the percentage of customers or subscribers who discontinue their relationship with a company or service within a given period of time. This metric is commonly used in industries such as telecommunications, banking, and software, where customer retention is crucial for business success. A high churn rate can indicate issues with customer satisfaction, product quality, or competition, while a low churn rate is a sign of customer loyalty and satisfaction. Companies closely monitor their churn rate and use strategies such as customer retention programs and improved customer service to reduce it and maintain a strong customer base.