This document discusses customer engagement in the 21st century. It defines engagement as building relationships through repeated interactions that strengthen a customer's emotional and psychological investment in a brand. Engagement is important as it creates loyalty, increases revenue and profit, and facilitates learning for both companies and customers. However, engagement requires creating an emotional link with customers through conversation and creativity. The document recommends approaches like empowering employees, listening to feedback, building communities, and measuring engagement to facilitate customer relationships in today's changing technological landscape.