What happens next?

How to root the lg optimus g pro 
Verify that your lg optimus g pro has a battery charge of at least 75 percent. 
Tap on " menu, " then tap on " settings. 
Tap on " software development, " then place a checkmark next to " usb debugging.
Connect your device to your computer using a usb cable. Wait for your computer to recognize your lg optimus, and wait for it download and install all updated software drivers, if applicable.