Probably stock the store, help people find things and run the register.
You'll be a floater filling in for any one and everyone who is not there, on lunch break or has quit.
It means that you'll end up doing whatever people need you to do - probably stuff like organizing documents, booking and scheduling, perhaps some bookkeeping... just whatever. It's not a bad place to be because formless positions give you opportunities to do interesting stuff.
pretty sure that's a hooker.
used to be called being the 'gofer' ..
as in gofer this, gofer that
It means you get to do all the tasks that no one else wants to do.