Is very useful for those who want to change application without close the current one.
Is also a good memory optimizer, the let you kill or free the memory space of other application,and fill it back when you open it again.
You can enable or disable bluetooth, wifi, wifi hotspot ,data traffic,airplane mode,gps,vibrate mode with one click.
Also open a new application in a very simple and fast way.
And you can customize it with whatever images you want.