Manager (WordPress Role)
A manager is a WordPress user who has the most control over a website, its users, and its content.
Their roles are described in "User Roles in WordPress", which also describes the control panels they have access to.
Generally, this is the smallest group of users on a website with multiple users. For security and other reasons, you should keep the number of managers as small as possible. On a site with a single user, that user will automatically be an manager.