How many types of users WordPress have?

[Pavan Techn]

WordPress user role determines access permission to the users of a WordPress site.

Administrator: They have full rights over a site.
Editor: They deal with content section of a site.
Author: They only deal with their own posts. They can delete their post even after publishing.
Contributor: A contributor doesn't have right to publish their post or page. They need to send it to the administrator for review.
Subscriber: Users which are subscribed to your site can log in and update their profile.
Follower: They don't have any right. They can only read and comment on your post.
Viewer: They can only read and comment on a post.