The Module Setup, Org Structure, and Organization Settings sections are found at the bottom of the navigation bar.
These sections are only accessible to an admin in the organization. If you don’t see them, you aren’t designated as an admin.
In Org Structure, admins can access the Users, Teams, and Org Units tabs.
In the Organization Settings section, admins can edit Account Info and Billing details, and manage Integrations with external applications. See Integrations for more details.
The admin who is the owner can also Transfer ownership to another admin. See How to Transfer Ownership for more details.