User interaction with a Flutter application can vary, for example, in the case of smartphones or tablets, it primarily involves gestures, and everything is quite simple. But when it comes to the web and desktop, the mouse and keyboard come into play. In the case of TV platforms, we're left with only a remote control. And the only thing a user can control is the focus. Let's delve into what focus is, what capabilities Flutter offers for managing it, and how to create a cool and beautiful UX by controlling focus alone.