The document discusses using email and customer relationship management (CRM) systems to build customer loyalty. It explains that email can be used as part of the CRM process to attract, retain, and engage customers at different stages from prospects to former customers. The document provides best practices for email marketing, including developing targeted lists, writing effective subject lines, testing, and compliance with spam laws. The overall goal is to use email and CRM to increase customer perceived value and create long-term customer loyalty.