This document discusses the importance of user experience (UX) design. It begins by asking why we need UX and then provides examples from companies like Airbnb that achieved great success through a focus on UX. The document outlines UX design processes like defining user needs, designing customer journeys, testing, and measuring results. It notes that UX design today is more holistic and data-driven. Recommended case studies and talks are also provided that further illustrate the business value of prioritizing good UX through improved conversion rates and customer satisfaction.