About roles
To perform any actions on GitHub, such as creating a pull request in a repository or changing an organization's billing settings, a person must have sufficient access to the relevant account or resource. This access is controlled by permissions. A permission is the ability to perform a specific action. For example, the ability to delete an issue is a permission. A role is a set of permissions you can assign to individuals or teams.
Repository-level roles give organization members, outside collaborators and teams of people varying levels of access to repositories. For more information, see "Repository roles for an organization."
Team-level roles are roles that give permissions to manage a team. You can give any individual member of a team the team maintainer role, which gives the member a number of administrative permissions over a team. For more information, see "Assigning the team maintainer role to a team member."
Organization-level roles are sets of permissions that can be assigned to individuals or teams to manage an organization and the organization's repositories, teams, and settings. For more information about all the roles available at the organization level, see "