Users with the editor role will have full control on the content sections of your website. They can add, edit, publish, and delete any posts on the site including the ones written by others. An editor can moderate, edit, and delete comments as well.
Editors also have access to add/edit/delete users.
As the name suggests, users with the author role can write, edit, and publish their own posts. They can also delete their own posts, even if they are published.
When writing posts, authors cannot create categories however they can choose from existing categories. On the other hand, they can add tags to their posts
Authors can view comments even those that are pending review, but they cannot moderate, approve, or delete any comments. It is a fairly low-risk user role on a site with the exception of their ability to delete their own posts once they’re published.
Contributors can add new posts and edit their own posts, but they cannot publish any posts not even their own. When writing posts they can not create new categories and will have to choose from existing categories. However, they can add tags to their posts.
The biggest disadvantage of a contributor role is that they cannot upload files (meaning they can’t add images on their own article).
Contributors can view comments even those awaiting moderation. But they cannot approve or delete comments.
Users with the subscriber user role can login to your website and update their user profiles. They can change their passwords if they want to. They cannot write posts, view comments, or do anything else inside your website admin area.
This user role is particularly useful if you require users to login before they can read a private post or member only content.