Soft resets are usually conducted in an attempt to fix malfunctioning applications or because they're required for software installation.
Soft reset contrasts with hard reset, which removes all user data, settings and applications and returns a device to the same state it was in when it shipped from the factory.
1. The soft reset process begins from unlocking your screen and holding down your power button.
2. Then you should see a menu like this on your screen.
3.Now tap on the Reboot or Restart option to end the entire process.
4. This is it. Soft reset is really easy to do so remember to do it once in a while so your phone won't lag so much.