The document discusses the benefits and strategies of email marketing. It outlines that email marketing is a cost-effective way to quickly generate revenues and build customer relationships. Effective email marketing involves setting objectives around acquisition and retention, using common models like sales promotions and newsletters, and eliciting measurable responses from recipients. Key strategies include testing subject lines and content, making calls to action obvious and clickable, growing email lists, and repurposing content across platforms. Proper measurement of clicks, activities and conversions is important for evaluating email marketing effectiveness.