If you have multiple tracks in your Playlist and would like a fast way to edit all Tags, use Select All in Playlist, then Playlist Track Tags from the Edit menu.
Learn more about tags.
Open a Playlist with multiple tracks.
Go to the Edit menu and choose Select All in Playlist. All tracks in your Playlist will be highlighted.
From the Edit menu choose Playlist Track Tags. The Edit Track Tags window will open and all tracks will be available to edit.