Staff Teams have all of the features of Class Teams but has a ‘Staff’ Notebook instead of a ‘Class’ Notebook. Teachers can use these to collaborate with colleagues, share resources and manage content. For example, teachers can store master Class Notebook files or other resources and use them across multiple Class Teams.
NB: Second screenshot is from OneNote desktop showing moving the Content Library from a previous/master Class Notebook (stored in a Staff Team) to new Class Teams.
Go back to Teams help here.