Here are the different playbook roles:
Administrator - All creating and editing permissions plus the ability to edit users and billing.
Editor - Can create and edit all cards and playbooks.
Contributor - Can create playbooks and cards but can only edit their own cards and playbooks.
Participant - View only of cards and playbooks. Can create their own playbook to add existing cards, but cannot create their own cards.
Observer - View only of cards and playbooks. Cannot create their own playbook.