It's pretty easy. Say you're in a tough spot, a romantic rut, a personal jam. You go to the site, and post your problem.
Some kind soul will read it (without seeing any of your contact info) and send back a song to (ideally) make you feel better.
No big problems weighing you down? Lucky you. Maybe suggest a song for someone else's troubles.
Site creator Robyn Overstreet says the most common causes of complaints (at least so far) are boyfriends. And she's got a list of the top 25 recommended songs here. Among them: Keep Your Head Up by Andy Grammer, The Middle by Jimmy Eats World, and a bunch of Bob Marley tunes.