You fingerprint a song you don't know who the artist is and when you identify it you add it to your library or a playlist.
Contrast this to now with you would like to know what artist performs a song and you Shazam a song in one app and then when you identify it you open up Deezer or Spotify or whatever and then have to type it in the search box and then add it to your library or a playlist.
By integrating fingerprinting you can identify and add new music all in the same app.
