If you were around for the earliest days of MySpace and Facebook, you'll recall how integral your taste in music was to the whole aspect of social networking/building an online #brand. Tinder is locking back into that with the ability to show prospective right-swipers your favorite songs via Spotify.
Even non-Spotify users can put one song on their profile with a feature called Anthem. Spotify dreamily summarizes your Anthem like so:
"It’s that one single track that tells your story. That one song you can’t get out of your head. Where the lyrics of your life meet the rhythm of your soul. It may change as you change, but at any given time, you have an anthem—and the world is waiting to hear it."