On my view it is literally nothing. It's the tautological observation that agents with desires, uninhibited, can and will seek to satisfy those desires. It gives us no grounds for responsibility, punishment, etc etc. (Those are all good things, but their justification has to come from elsewhere.)
But by continuing to call it "free will," you're invoking the intuitions that many people have regarding the magical bullshit variety, and laundering those intuitions/feelings into the new discussion.
