The process of rooting Rooting is the process of installing the "Super User" account in Android.
Which are the processes carried out in rooting ?

I mean how actually it's done ?

Apps like Kingroot can root many devices in one click. But how to root Android phones through computer ?

I am asking this question because my phone (LYF Flame 7)  which is unsupported by many 3rd party rooting apps so I have to find myself a way to root it. I have found many device-specific articles but found none general methods. 
Kernel is 
Android 3.10.65 svn 621
cme@cme-server #01

I really need to root to get rid of these annoying bloatwares .. More and more bloatwares are getting installed in every unstoppable OTA updates.
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.