DenverRalphy explained it well. I like the widgets that allow you to see them main information you would want from the app (Twitter, Facebook, Weather, Sports Scores, News, etc..) or allow quick access to important features within an app like the power control to cut on and off the different wireless connections, flip through reward cards on Key Ring, access play pause etc on media players, and so on.
My home screens are full of folders, widgets, and shortcuts.