This document discusses using customer data to improve email marketing relevance and revenues. The key points are: 1. Customer data from various sources like social media, brand interests, purchase history can be used to segment customers and personalize email content to improve customer experience and marketing effectiveness. 2. A data-driven approach allows marketers to communicate with customers based on their preferences and needs, driving loyalty and satisfaction. It also makes marketing more efficient by reducing costs and focusing efforts. 3. Proper segmentation and triggering emails based on customer lifecycle events can increase average purchase amounts and encourage referrals through highly personalized and relevant communications.