You can identify a song on your Apple Watch using the Shazam app for watchOS. You can also instantly identify a song by tapping the Shazam complication on your Apple Watch face.
Here’s how:
° Launch the Shazam app and top the Shazam icon.
° On your watch face, tap the Shazam complication.
The song is identified and is saved to the Shazam app.
You can tap the play icon to preview the song. You can tap the blue backwards-facing arrow icon to return to the Shazam button and to view your recent songs.
On Apple Watch, you can identify a song with just your voice using Siri.