The document outlines 5 key benefits of email marketing: 1) It has low costs compared to physical mail due to savings in postage and shipping. 2) It allows for constant communication with customers globally. 3) Email marketing provides global outreach by allowing businesses to send bulk emails to thousands worldwide. 4) Platforms make email marketing easy to track through metrics like open and bounce rates. 5) Interactive designs can engage audiences through two-way communication, games, and quizzes.