You use it for animation and visual effects, I did my little video intro in AE. If you are keen to get into some more complex animations and effects and you can get you hands on a copy without too much costs ... then it's totally worth playing around with, but make sure you have the time to get through the steep learning curve. I'm no master of the program myself but check out my intro to get an idea of what the program can do: [PV=121310]