The Wayback Machine - https://web.archive.org/web/20200929085912/https://docs.github.com/en/enterprise-server@2.21/github/setting-up-and-managing-organizations-and-teams/about-organizations

GitHub Docs

GitHub Docs

About organizations

Organizations are shared accounts where businesses and open-source projects can collaborate across many projects at once. Owners and administrators can manage member access to the organization's data and projects with sophisticated security and administrative features.

Organizations include:

Unlimited membership with a variety of roles that grant different levels of access to the organization and its data
The ability to give members a range of access permissions to your organization's repositories
Nested teams that reflect your company or group's structure with cascading access permissions and mentions
The ability for organization owners to view members' two-factor authentication (2FA) status
The option to require all organization members to use two-factor authentication