Doing so is like restarting or powering on/off your computer each day, which is really what your Electrify is (a computer.) Doing so puts everything back into place after a day's activities with the phone. All data, files, and apps are reorganized, put back into place, making your phone run more smoothly, quickly, and efficiently the next time that you turn it back on. If you have deleted any files, apps, cache, history, etc., it does a better job of erasing everything and freeing up your memory and RAM. Some people never turn their devices off, and back on each day and seem to get along fine. But, I believe that most users will power cycle their devices daily for optimum operation.