Outside of the subscription service, Apple Music lets its users match up to 100,000 songs from their iTunes library (or libraries) to the DRM-free iTunes Store catalog; these tracks can then be streamed or downloaded to up to ten of your other devices. (If Apple Music can't match a track to a song in the iTunes catalog, it'll manually upload it, instead.) Purchased iTunes content doesn't count toward that 100,000 song limit.
