The key factors of the user experience (UX) are usability, design, content, intuitiveness, responsiveness, and performance. Usability refers to how easy and efficient a mobile app is to use and navigate. Design involves the layout and structure of the mobile app and includes elements such as visuals, icons, and fonts. Content includes the text, images, and videos on the app. Intuitiveness involves making the interface as simple and straightforward to use as possible. Responsiveness pertains to how quickly the app responds to user input, while performance covers the speed and reliability of the app.