The playlist is for selecting tracks from your account that you would
like to stream as a list. From the Releases tab, hover your mouse over
any release and you will see the "Add to Playlist" icon. Clicking on
that will add the selected release to your Playlist. If you want to add
an individual track from a multi-track release to the Playlist, just
click to open it and click the "Add to Playlist" icon for the desired
track. To rearrange the order of tracks in your Playlist simply drag and
drop individual tracks into position. The track list is saved with your
account, so if you build a Playlist on your home computer or mobile, it
will be available on your work computer once you login.