WordPress User Roles Explained
All of the recent headlines about large-scale data breaches make it easy to forget about the importance of our own internal website security. Luckily, WordPress comes with five default user roles that help you control how individual users interact with every aspect of your website.
Once you understand the capabilities of these five WordPress user roles, you can instantly assign or modify roles through the User screen on the WordPress dashboard.
Source: https://thethemefoundry.com/blog/wordpress-user-roles/