This document discusses impact-driven product management and impact mapping. It introduces impact mapping as a framework to help deliver desirable products by mapping out the desired impact, how the product will achieve that impact through user needs and behaviors, and the technical solution. The document provides examples of impact maps and exercises for readers to practice creating impact maps, including identifying metrics, users, and evaluating designs. The goal of impact mapping is to provide guidance for product development by clearly linking it to the desired business and user impacts.