The document discusses customer loyalty programs. It defines loyalty programs as programs that allow customers to accumulate rewards for repeated purchases over time. Loyalty programs are best suited for competitive industries with undifferentiated products where retaining existing customers is important. They provide benefits to both customers and firms. For customers, they offer incentives and rewards for loyalty. For firms, loyal customers spend more on average and are less price sensitive, providing competitive advantages. Effective loyalty programs require tracking customer purchase data to customize rewards and communications.