Use iCloud Music Library on PC
In your iCloud Music Library, you can store the following:
Up to 100,000 songs, not including songs (or music videos) purchased from the iTunes Store; files can be no larger than 200 MB
Music videos purchased in the iTunes Store
Playlists that include only songs
Smart Playlist rules, which are applied on the computer or device they’re downloaded to
Note: iCloud Music Library isn’t available in all countries or regions.
Turn on iCloud Music Library on other computers
You can turn on iCloud Music Library on other computers you authorised to access your iTunes purchases.
In the iTunes app on your PC, sign in to the iTunes Store using the same Apple ID that you used to set up iCloud Music Library on the first computer.
Choose Edit > Preferences, then click General.
Select the iCloud Music Library tickbox.
Turn on iCloud Music Library on your iPhone, iPad or iPod touch
WARNING: After you turn on iCloud Music Library on a device, all the music that’s currently on the device is deleted and replaced with songs from iCloud. Also, you can’t use iTunes to sync music with the device. You can add songs to the device only by downloading them from iCloud.
In the iTunes app on your PC, if you haven’t done so already, sign in to the iTunes Store from the device using the same Apple ID you used to set up iCloud Music Library on your computer.
On your device’s Home screen, tap Settings, then tap Music.
Tap to turn on iCloud Music Library.
For information about adding songs to your device from iCloud, see the documentation for your device and the iCloud Support website.