The document defines UI and UX, and outlines the steps in the UI/UX design process for mobile app development. Specifically:
UI refers to the visual design and look/feel of an app, including screens, buttons, fonts, etc. UX refers to how easy and enjoyable the app is to use.
The UI/UX design process involves: 1) creating a user journey map to visualize the user experience, 2) building a wireframe to define user flows, 3) creating an interactive prototype to test functionality, 4) graphic design of the UI, and 5) usability testing to validate design decisions.