Firstly what is rooting?
Rooting is a process that allows android
Operating System users to attain root access over various android sub-systems.
By rooting you randroid, you can increase
your device’s performance, increase battery life, and can load custom software.
Now How to root android phone with Kingroot.
KINGROOT is an application that lets you
root your Android device in a matter of
seconds, as long as you have an operating
system between Android 4.2.2 and
Android 5.1. This means that this app lets
you do the same thing as the classic
Towelroot, but you can use it even if you have Lollipop.

How to root Android using Kingroot
Download Kingroot app, visit www.infoguide.com.ng
to download it, Open it
After installing and click Green
root Button
wait a minute for finish this
process
After finish, reboot your phone and
enjoy it.
Visit http://infoguide.com.ng/how-to-root-android-phones-using-kingroot/ for images on step by step guide for proper understanding

Can it root android version 7.0?

yes it can root all andriod phones

GIFTNAIJA:
yes it can root all andriod phones

Doesn't root android 7