This document discusses the effectiveness of loyalty programs (LPs). It identifies drivers of LP effectiveness as commitment, positive word-of-mouth, and true loyalty from customers. Key factors that determine LP effectiveness are its design, customer characteristics, market characteristics, and firm characteristics. LPs are most effective when their rewards are attainable and relevant to customers and their design is aligned with the firm's goals. The ultimate goal of LPs should be to use customer data to create competitive advantage through more effective marketing decisions that deliver true value to customers.