netbox-community-netbox/docs/data-model/tenancy.md

NetBox supports the concept of individual tenants within its parent organization. Typically, these are used to represent individual customers or internal departments.

Tenants

A tenant represents a discrete organization. Certain resources within NetBox can be assigned to a tenant. This makes it very convenient to track which resources are assigned to which customers, for instance.

Tenant Groups

Tenants are grouped by type. For instance, you might create one group called "Customers" and one called "Acquisitions."