Associate
think i shall just leave itRoot is the linux equivalent of a Windows administrator account - it gives full access to everything, including a command line shell (like command prompt). You can make advanced changes to the OS and allows you to be able to install any application (whether this is possible or not, depends on how good you are with linux). Some applications require root access and thus this is why it is a good thing.
It's a bad thing because you can break the software on your phone with full access.
That's it in a nutshell.