Introduction to WordPress user roles and capabilities

WordPress defines what a user can and can’t do by using a system of roles and capabilities, but what does this actually mean? Below we’ll analyze roles and capabilities a bit and see how we can alter them with the use of a plugin. User roles
Roles are essentially user groups, WordPress comes with six out of the box. These go from the most basic of subscriber all the way up to the most powerful one of Super Admin. Let’s learn a bit more about them.
Subscriber: the most basic role a user can have. A subscriber can only read published posts and pages and modify their own profile.
Contributor: a contributor can create new posts and modify their content, but can’t publish them.
Author: an author can create, modify and publish their own posts.
Editor: the editor can do anything an author can do and additionally has the capability of modifying, publishing and deleting other users’ posts.
Administrator: along with all the above permissions and administrator can handle administrative tasks, such as installing plugins and themes, modifying site settings and more.
Super Admin: the final user role can only be found on multisite installations and grants the user the
Source: https://managewp.org/articles/13933/introduction-to-wordpress-user-roles-and-capabilities

source https://williechiu40.wordpress.com/2016/12/01/introduction-to-wordpress-user-roles-and-capabilities/