This document provides an overview of customer relationship management (CRM) in retail. It discusses how CRM focuses on identifying and building loyalty with valuable customers. The goal is to develop a base of loyal customers who shop frequently. It then outlines the typical CRM process: [1] collecting customer data to build a database; [2] analyzing that data to identify target customer segments; [3] developing programs tailored to each segment, such as loyalty programs, personalized offers, and community building; [4] implementing those programs. Key aspects of CRM programs include incentivizing enrollment in loyalty programs, analyzing purchase patterns to determine customer lifetime value, and using data to convert less profitable customers or get rid of unprofitable ones.