Usually People unlock their Smartphone's to Gain Root access and Install Custom Firmware . Motorola Moto G 3rd Generation can also Be Rooted and Flashed with Custom Roms .
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But After Unlocking Bootloader , All Phones gets a Warning Sign while Booting , To remove the warning here is a Guide for Motorola Moto G 3rd Generation . Thanks to xda developer Alberto97 for making this file to remove Warning sign .
How to Remove Unlocked Bootloader Warning on Moto G 3rd Gen ( 2015 ) -
Step 1. Download The Flashable zip file from below .
Step 2. Boot to recovery Mode ( TWRP recovery ) .
Step 3. Select Install zip from Sdcard .
Step 4. Choose the zip file , you downloaded following Step 1.
Step 5. Reboot .