User Roles

This  is the base user level in Ghost. Contributors can create and edit their  own draft posts, but they are unable to edit drafts of others or  publish posts. Contributors are untrusted users with the most basic access to your publication.

Authors are the 2nd user level in Ghost. Authors can write, edit  and publish their own posts. Authors are trusted users. If you don't trust users to be allowed to publish their own posts, they should be set as Contributors.

Editors  are the 3rd user level in Ghost. Editors can do everything that an  Author can do, but they can also edit and publish the posts of others -  as well as their own. Editors can also invite new Contributors+Authors  to the site.

The  top user level in Ghost is Administrator. Again, administrators can do  everything that Authors and Editors can do, but they can also edit all  site settings and data, not just content. Additionally, administrators  have full access to invite, manage or remove any other user of the site.

The Owner
There  is only ever one owner of a Ghost site. The owner is a special user  which has all the same permissions as an Administrator, but with two  exceptions: The Owner can never be deleted. And in some circumstances  the owner will have access to additional special settings if applicable.  For example: billing details, if using Ghost(Pro).

It's  a good idea to ask all of your users to fill out their user profiles,  including bio and social links. These will populate rich structured data  for posts and generally create more opportunities for themes to fully  populate their design