This document discusses a study on user experience (UX) in web applications. It first defines UX and discusses how interaction is a key part of maps and visualizations as they become more interactive online. It then discusses how UX design focuses on user comfort and flexibility due to diverse information provided by web apps. The document reviews related work on UX methods, designs, and factors affecting app popularity. It also discusses UX methodologies like skeuomorphic, flat, and material design. The key goal of UX design for web apps is optimizing the user experience.