Apple Music is, to quote the company, "All the ways you love music. All in one place."
In non-marketing lingo, Apple Music is built around two major components: iCloud Music Library, which combines your purchased music library and ripped tracks in one place; and the Apple Music streaming catalog, where you can find more than 10 million tracks from artists around the world.
These two parts live side by side in the Music app: You can keep each separate by only streaming the Apple Music catalog, or you can add streaming songs to your offline Music library, where they can be mixed into playlists (offline or publicly shareable) or shuffled amongst the rest of your music.
Apple Music also offers a massive recommendation and browsing area for its streaming catalog: As you listen to songs in the Music app, Apple collects data about your tastes and drops daily custom-curated playlists in the app for you to listen to, along with a weekly algorithmic "New Music" mix that suggests songs and artists you might like. You can also poke around the entire streaming catalog's array of new music, curated playlists, music videos, and more.
Lastly, Apple Music includes a live, 24/7 radio station called Beats 1: It's only available to paying subscribers and features three main DJs along with a panoply of specialty shows from artists like Dr Dre, Elton John, Ryan Adams, Frank Ocean, Major Lazer, and Anna Lunoe.