The document discusses calculating customer lifetime value (CLV), which is defined as the net present value of the cash flow from a customer over the entire relationship. Calculating CLV provides benefits like valuing customer relationships, evaluating proper investment in each customer, and emphasizing long-term relationship cultivation. The standard CLV formula uses variables like gross profit margin, repurchase rate, and interest rate. The document recommends identifying these variables, calculating CLV for customers, highlighting patterns, and using CLV for marketing and sales planning.