Rich Metadata. The new web API lets developes retrieve extensive track, album and artist details from the Spotify catalog, including cover art and 30 second track previews.
User Profiles & Playlists. With a user's permission, developers can now access user profile information including playlists, display name, image, country, email, external URL, and subscriber status. Web apps powered by this new API can also build new playlists for users to enjoy later, in their Spotify apps.