2Tired! Not wanting to sound "thick" here, but how would I need this?
To qualify that, I currently have my own network that no one else touches, so meh. BUT I will be working in a "real" office soon and I suspect that this will be useful. But I cannot make the connection at the moment. Just call me "Clueless in Minneapolis" or at least in a couple or few months.
It causes the system to automatically log on to a password protected account... so you don't have to enter your name and password every time. If you're the only person using the computer (as in, its locked up in your den) it saves you the annoyance... If there's only one non-passworded account on your machine (which is a very dumb thing to do) you don't need it.