How to use Cydia Impactor to root any Android Device
Step 1: Enable USB Debugging on your Android Smartphone. To enable USB debugging, Open Settings > Developers Option > USB Debugging > Tick to Enable.
(Developers Option is hidden for Android 4.2.2 or above, to show this option Go to Settings > About Phone > Built Number (Tap on it for 5-8 times).
Step 2: Download and extract Cydia Impactor on your computer. After extracting, you will be able to see the following files:
Step 3: Now, Open Impactor.exe (you have extracted this file in step#2).
Step 4: Once Cydia Impactor Application is launched, connect your Android device to the computer (with USB Debugging enabled).
Step 5: Now, to begin the rooting process click on the Start Button.
Step 6: Now, Cydia Impactor will install SuperSU binary on your Android Device. Once, this process is completed, close the Cydia Impactor application and Disconnect your Android Device from the computer.
Step 7: Now, Restart your Android Device.
Step 8: Once your Android Device is restarted, Open Google Play Store. In PlayStore Search and Install SuperSU application (chainfire).
Step 9: Now your Android Device is Rooted successfully. To check whether your phone is rooted correctly, open SuperSU application that you have installed from Play Store. If you are able to use it without any error then it means your device is rooted successfully.