This document discusses defining target audiences for marketing and social media. It explains that target audiences can be defined by demographics like age, gender, and location, as well as psychographics like values, interests, and behaviors. The primary audience is the most specific group that will get the most value from a product, while the secondary audience may influence the primary audience or use the product frequently as well, but not as much as the primary audience. Defining target audiences is important for understanding who will care most about and use a product the most.