I recently found a Sonos Play:3 speaker that I bought a while back at the Goodwill Outlet for a couple of bucks, probably no more than $3-4. I plugged it into my network and set it up and it all seems to work properly, but I don’t know what the purpose of this device actually is. Can someone here edumacate me on what this thing is supposed to do and why it’s supposedly the greatest thing since sliced bread?