This document provides an overview of user experience (UX) design. It defines UX design and distinguishes it from customer experience design. UX design focuses on the quality of the user's experience with a product, service, or environment. It draws from many disciplines like psychology and design. The document also discusses responsive design and how the UX must be responsive across devices. It outlines the common roles, skills, and resources involved in UX design projects, including strategists, designers, visual designers, and technologists. Finally, it addresses some common misunderstandings about UX design.