This document provides guidance for startups on using social media to build tribes and movements around their products. It emphasizes that people are drawn to belonging, leaders, and new ideas. To build a tribe, startups should determine their target market, authentically share their passion and beliefs, and create ways for the tribe to communicate both internally and externally. By empowering the tribe to spread ideas on their own, startups can create movements where peer support leads to viral growth. The document outlines specific steps startups should take, such as publishing a manifesto, making it easy for followers to connect, tracking progress publicly, and listening to feedback to iteratively improve.