A collection is a set of songs that can be assigned to a Group all at once. Collections work like labels — a song can belong to several collections at the same time. Tapping a collection shows all of the songs inside.
Create a collection
Collections can be created in the Music tab and automatically assigned to the current Group
Tap the
Music tab
Tap the Collections tab at the top
Tap the
add button in the bottom right corner
Select Create New Collection
Enter a name for the collection and tap Continue
Select songs to include in the collection and tap Create

Music tab
add button in the bottom right corner