Role gives a user permission to perform a certain action on your website. The user’s role controls which permission a user has.
WordPress comes with six default user roles: Super Admin, Administrator, Editor, Author, Contributor, and Subscriber. Each role has a different set of capabilities, with Super Admin being the highest level of access, followed by Administrator, Editor, Author, Contributor, and Subscriber.
Users with higher user roles have access to more features and functions within the WordPress dashboard, while users with lower user roles have limited access. User roles can also be customized or added using various WordPress plugins.
However, additional plugins may create custom roles for your website. And you can also create custom roles using any WordPress user role plugins.