When you buy a brand new android phone or Tablet ,then you are just a gust user/not high privilege user on your android phone or tablet. just as a guest would use Windows. (windows 7,8,10) that means, you can’t make any changes to the phone’s system files. but After rooting, this can be changed, you can do any thing to phone as you like.
what can i do with rooted phone
♥ INSTALL INCOMPATIBLE APPS
When compared to Normal play store applications, root applications provide more features for your phone and you will be able feel that they are so awesome apps.. Top Root apps for your phone. they can uninstall pre-installed apps too and many more.
♥ FLASH A CUSTOM KERNEL
After rooting, you can install/flash custom Kernel. actully kernel is the main thing in your phone. more details – What is the kernel
♥ IMPROVE BATTERY LIFE AND SPEED
There are some apps increase your rooted phone’s battery life and speed – Click here
♥ Run Custom ROM
There are 2 Roms. One is Custom Rom, and Second one Is Stock Rom..Stock Rom is official Rom. and Custom Rom is not official. Rom is like Windows in your phone.. Custom Rom, They are optimized in performance and battery more than Stock Rom. to install Custom Rom, you need to Root your phone. more about- What is the Stock & Custom Rom? Firmware? Bootloader?
♥ REMOVE STOCK ANDROID SKINS
you can use High quality themes, Skins to change the phone. and there are so many app to change your phone’s features and enjoy hundreds of hidden features on your phone.