At the bottom of vendor profile, there is an text box for you to insert your GA code.
Question: what does this do? What kind of stats am I expected to see in Google Analytics? I don't have the luxury of trial and error at the moment.
Google Analytics is an amazingly helpful tool. I would suggest reading for the specifics on their site if you haven't already, but on top of that, I did you one better: I took some screenshots of the dashboard and report table of my own Analytics page, to give you an idea of how awesome Analytics is. You can view it here: http://imgur.com/a/HUC5E
The dashboard, and all reports, are fully customizable, and they tell you exactly what is going on with... well, your whole site, really.
There's nothing another stat-tracking software can tell you that Google Analytics can not.