Instabug is a tool that helps mobile teams collect product feedback through in-app surveys, and it allows users to customize the UI of these surveys to match their app's branding. By customizing the theme, primary color, and floating button options, developers can create an immersive experience for their users, increasing response rates and user trust. The survey interface should be consistent with the rest of the app's design elements to avoid eroding user trust and undermine the brand. Developers can customize these settings using code snippets provided by Instabug, which supports both iOS, Android, and cross-platform apps.