With Google Play Music due to close later this year, Google have begun rolling out their transfer tool to help users easily migrate to YouTube Music.
After a month long beta, Google have now started rolling out the feature to all users. The transfer tool will help move over your entire library including songs, albums, playlists, purchases, uploads, taste profile and recommendations with one click
To get access to the tool, install both Google Play Music and YouTube Music on your device and check back regularly for the pop-up. Be sure to transfer over your library before Play Music closes for good.