This document defines what a startup is and provides guidance on how to effectively build and validate a startup business model. A startup is defined as a new business venture designed to develop and validate a scalable business model. The document discusses the importance of finding a co-founder, validating the problem-solution fit through customer interviews, building an MVP, and focusing on metrics like retention, LTV, and CAC to determine if the business model can scale. Effective funding options for startups like accelerators, angels, and VCs are also mentioned.