This document defines user experience (UX) and its relationship to other fields. UX encompasses how users interact with and experience a product or service, with the goal of meeting user needs. It involves elements like information architecture, interaction design, and visual design. The document outlines common UX roles like user researcher, information architect, and interaction designer. It emphasizes that UX is about the overall experience rather than just the user interface. UX aims to understand users and design intuitive interactions to meet business goals.