Retention can be measured using various metrics, including:
Customer Retention Rate (CRR): This is the percentage of customers who remain over a given period. It is calculated as ((E-N)/S) x 100, where E is the number of customers at the end of the period, N is the number of new customers acquired during the period, and S is the number of customers at the start of the period. Churn Rate: This is the percentage of customers who leave during a given period. It is the inverse of the retention rate. Repeat Purchase Rate: This measures the percentage of customers who make more than one purchase.