Instructions (2nd method):
Copy downloaded UPDATE-SuperSU-v1.93.zip onto internal or external SD Card of your smartphone
Now boot into CWM mode
To do so, turn off your smartphone completely
Now turn it on, but as soon as you see purple LED turned on, press Volume up and down button repeatedly until you are in CWM mode
When you are in CWM Mode, select Install Zip
Now navigae to the folder or storage where you have put UPDATE-SuperSU-v1.93.zip
Confirm its installation and then reboot your smartphone
You will find SuperSU app in app drawer
You can also confirm root access by installing Titanium Backup app
Now enjoy and do whatever you want with your smartphone!