It's more screen estate. Where it's usefuld depends on what you are doing. I often have one screen for "actual" work and the other screen for chat/mail/... th

It's more screen estate. Where it's usefuld depends on what you are doing. I often have one screen for "actual" work and the other screen for chat/mail/... then checking for something going on there isn't a full context switch, but a short look. Sometimes in development a second screen can be useful to have a screen full of different code files and second screen for documentation or the app or logs or whatever. During video chat i have the faces of the others on one screen and notes and other things on the other screen or during social videoconfs during covid I have faces in one screen and second screen for a (board) game we are playing ... It always depends on what you are doing. Things one can do are many.