The first thing you need to do is to have an active Apple Music subscription. Then, the transfers can be done through a web browser at music.apple.com.

• On your web browser and go to https://music.apple.com
• Click Sign In and sign in with the Apple Account you use for Apple Music
• Click your photo or monogram in the top right-hand corner, then select Transfer Music
• Choose what you want to transfer
• Tap Add to Library
• Wait for Apple Music to find matches for your music in the Apple Music catalogue

After this process has been completed, you’ll see one of the following messages in the bottom of the sidebar:

Transfer Complete: Apple Music found matches for the music in the Apple Music catalogue and added the music to your library.

Some Music Needs Review: Apple Music didn’t find an exact match but found similar alternative versions for the music. Tap Review Now, choose an alternative version, then tap Save to add the music to your library.

Apple says that there may be some differences between its music library and its competitors’, so users have “30 days from the initial transfer to review unmatched music and choose from alternate versions to add to your music library.”
The company also notes that the tool only works for playlists created by the user, rather than also for playlists created by the platform from which the user is migrating.

To transfer to Apple Music on your iPhone, iPad, or Android:

• Go to Music Settings:

On an iPhone or iPad, go to Settings > Apps > Music

On an Android device, open the Apple Music app, tap the More button, then tap Settings

• Tap Transfer Music from Other Music Services
• Choose from the list of supported music services and sign in to the music service
• Choose what you want to transfer
• Tap Add to Library
• Wait for Apple Music to find matches for your music in the Apple Music catalogue