X Server is the backbone for Linux GUI. Every user impigne on X for its day-to-day work. X provides you with everything that you need for Browsing, Chatting, Watching Movies, Using ur favourite s/w to Listen Music.
Just Imagine a "Day Without X Server", using Command Line Interface (CLI) for all your day work. Don't worry there are a lots of CLI based softwares that makes you browse net, chat with your friends, watch movies, etc etc stuffs...
Folowing are...
