The document discusses email marketing strategies based on a study that found email to be more effective than social media for customer acquisition. Email conversions accounted for 50.8% of new customers, compared to 26.8% for Twitter and 22% for Facebook. The study shows email is still the dominant channel for driving referrals and conversions. The document provides tips for crafting effective email subject lines and content, such as keeping emails short, using images and design templates, and including a clear call to action.