We send you mobile notifications about your music - playlists you might like, when channels you follow have updates, when artists you follow have new songs, and more. You can always customize which mobile notification you receive.
On Android, tap the Menu button on the top left-hand side of your screen, go to Settings > Mobile Notifications > select your preferences.
On iOS, go to your My Music tab (bottom right corner), tap on the Settings wheel in the top left-hand corner > Mobile Notifications > select your preferences.