EDIT: Oops, somehow missed that The Verge article on how Discover Weekly works had already been posted!  It works on a variation of PageRank, where instead of links on pages, it uses songs in saved playlists.  (If you have a playlist with lots of songs similar to someone else&#x27;s playlist, you might like the songs in their playlist too.  If a song is on lots of playlists, it&#x27;s probably noteworthy, etc.)