If you don't know what root is, probably best to leave well alone. Root is basically having low-level system access in the device. And if not careful or don't know what you're doing, can seriously mess the device up, or even kill(brick) it completely. It's rather like software equivalent of "No user serviceable parts inside. Keep out!".
I think we've had a few posts from people with broken, dead or malfunctioning Hudls from when they've rooted, and deleted, damaged or corrupted something essential. Maybe because they tried something they read on some blog somewhere, without understanding if it was going to work, was accurate information, etc.