This document provides an overview of customer discovery, a framework for validating a target market through customer needs. It discusses how most startups fail because they do not validate assumptions with customers before building products. The document then outlines steps to conduct customer discovery, including defining customer personas, illustrating pain points, designing market segmentation, building an interview pipeline, structuring interviews, and beginning to cultivate an acquisition strategy. The overall goal is to help startups build better businesses faster by learning directly from customers.