The process of rooting
While I can't give you a step by step tutorial on how to root your phone, here are the basics for a manual method.

Firstly, you have to unlock the bootloader. This will void your warranty but will allow you to continue to the next step. Remember that I won't be responsible for any damages made to your phone.

Next, you will need to flash a custom recovery which will give you access to all the files on your device and let you wipe the system, install custom ROMs and more.

The last step is to flash SuperSu to the device using the recovery tool. Your device will be rooted.