

Tracks aren't downloaded to local PC in a playable format, but instead, the player streams the tracks from Spotify's service (again, with premium, it is possible to use Spotify in offline mode as well). Service is provided for free, but compensated by advertisements played every now and then between the played tracks (however, with the paid, premium version of Spotify, you can remove the ads completely). The audio quality is very good and software itself is quite light-weight and extremely intuitive to use.

With Spotify's client you can create and share playlists of the tracks found the service, find new artists via recommendations and more. Spotify has licensed virtually all major record labels' music to be used with its service and all that for free. Spotify lets you listen millions of high quality music tracks online, legally.
