The word USB Debugging Mode is a mode that can be enabled Android when you connect your device to your PC with a USB cable. The basic function of this mode is to establish a connection between your device & PC with software development kit. If you want to discuss with your device at developer level, or want to transfer data from PC to your device then you have to use USB Debugging Mode.
In this post we will discuss how you to enable this mode on your Android device.
How to Enable USB Debugging Mode on Android
USB Debugging for Android 2.0-2.3.x:
Settings > Applications > Development > USB Debugging.