How to root a android phone please I need this
You have two options of the applications that you can use.
Most of the people who make use of the kingroot can easily use it as enable and disable type of the mode. Supersu on the other hands is one time mode. And it does not often let you to disbale the root.
You can use either one of the apps and root your android phone. Some phone manufacturers also have the option of doing this which you can try out if you plan on rooting for some specific functionality.