Customer attrition rate is a measure of how many customers have left or stopped using your business over a given period of time. It refers to the number of customers who have either gone inactive or stopped purchasing from you, compared to the total amount of customers you had at the beginning of that period. Knowing your customer attrition rate can help you better understand the wellbeing of your business and identify areas for improvement. By proactively understanding and managing your customer attrition rate, you can ensure that your business has loyal, happy customers who keep coming back!