Shazam

Shazam is an audio application developed by Shazam Entertainment Ltd. This application lets you find out what song is playing in your background.

Once you start up Shazam, all you have to do is place your phone's microphone next to the speakers playing the music you want to know and then press the 'Tag Now' button. From there, you'll be given all of the information about that song like the song name, artist, and album it's from. Users will also be given the choice of instantly playing that song through various music streaming services.

Shazam is a great way to find out what most music in the background is. You'll run into some issues though if you are trying to find out more independent music as Shazam doesn't have complete music knowledge.

Overall, Shazam is the best way to figure out what a song is when you're not being given the name by anyone else.