Users (staff members) Roles Explained
Administrator
An administrator has full and complete control of a website and can do absolutely everything. This person has absolute power over modifying, deleting, and publishing (posts/pages, comments, settings, design, apps, importing, and managing users.)
Important: We recommend that you do not to assign users (staff members) the “administrator” role unless it is totally necessary or temporary. As this role will grant full access/permissions to change all aspects of your site.
Editor
An editor can view, edit, publish, and delete any posts/pages, moderate comments, manage categories, manage tags, manage links and upload files/images.
Author
An author can edit, publish and delete their own posts, as well as upload files/images.
Contributor
A contributor has the ability to edit their own posts but cannot publish them. When a contributor creates a post, it has to be submitted for review and approval by an editor or administrator. Once a contributor’s posts have been approved and published, the contributor can no longer edit them.
A contributor cannot upload files/images.
Subscriber
This is the default role assigned to website visitors who register at your site. Subscribers only have the ability to read public pages and leave comments.
You can enable the option “Users must be registered and logged in to comment”, by navigating to “settings -> discussions”