In my opinion, root is
.designed to unlock Android mobile device’s true potential. Rooted devices gives you the full control of your device by increasing its performance, changing fonts, boot animation, remove system data and many more.
It also allows you to customize the app and make it your own. You can change the entire look of it through theme settings, manage backups, access Android’s hidden testing menu, enable or disable boot animation and turn on/off camera shutter sounds. Usually root tools can root any android 2.2 upto android 4.4.For advance users, you can also configure sysctl.conf to maximize the device's performance.what’s more,it can reduce your battery consumption, reducing boot time and the phone’s load.
Thus,it is a
1.Real firewall, you can change the conections parameters to restrict some apps in your mobile data plan.
Hack Games, if you wanna grab some extras in purchase-in-apps, most of thems could be free.
3.When you data has lost,you should root before you use data recovery tool.
For some users, many of them are afraid of bricking their sets, so i suggest you choose one secure root tool to help you. I once used a named"iRoot" which is a free and simple tool.with just only one click.i get my Samsung rooted.