What are patron accounts?
Some public-facing functions in Springshare apps require an account, like posting on discussion boards or commenting on blog posts in LibGuides. Patron accounts allow you to give access to the commenting/posting features with blog posts and discussion boards while not allowing any access to the admin side of LibApps.
Patron accounts can be created by sending invitations, importing them in bulk via a spreadsheet, or by allowing anyone with an email address from a specific domain to create them on their own.
And if you have a LibAuth configuration setup, and you allow logging into LibApps with LibAuth, your patron account holders can sign in to post/comment with the same account they use in your local authentication layer. (Note: patron accounts must be created for each email address for the LibAuth login option to work.)