It allows you to choose when and how much electricity to buy on a prepaid basis, so you can make weekly or bi-weekly payments rather than an entire month's worth of electricity all at once.
You may have heard, or seen online, stories about so-called "Death Clocks," or ways to predict how many years you have left on the glove. Using a variety of information sources, your age, health, medical conditions, illnesses etc etc. they predict what year or so you're going to die. Now, it's taken on a WHOLE NEW LEVEL!