This document provides an overview of an affiliate marketing system called the "Piggyback Money Machine." It discusses the essential pieces of an affiliate marketing system including content, audience, email, product, and sales. It emphasizes building relationships with an audience through regular email communication and giving away free lead magnets or content to generate sales. The goal is to drive traffic to an opt-in page to build an email list, then use a series of emails to promote affiliate products and drive conversions.