This document discusses the differences between product management and project management. Product management oversees a product throughout its entire lifecycle, while project management focuses on a specific project from initiation to completion. Both roles involve identifying opportunities, guiding development teams, and monitoring progress. However, product managers ask "what" and "why" questions while project managers ask "who" and "how" questions. The document then outlines typical responsibilities and skills for product managers, project managers, and product owners. It also describes a sample day for a product manager which involves discovery, planning, execution, and growth activities.