iOS 8 includes Shazam — a magical technology that gives your iPhone the power to listen to a song and tell you what it is. In the car, at a movie theater, or even at a crowded bar, you can just ask Siri, “What song is playing?” or hold your home button for a few seconds, and your iPhone will use Shazam tech to tell you exactly what song is in your environment. You can also (surprise) buy the song you just recognized via a little button in the results screen.
But what if you want to buy it later? Or remember what song was playing at the bar last night when that cute girl gave you her number? You can easily do just that with a quick trip to iTunes on your iPhone.