Benefits of domain separation
Domain separation may work better for your customers' organizations than any other method for separating the data between groups and departments.
You can enable domain separation with a ServiceNow plugin that has functionality built into the core platform. The separate domains configuration is managed by a product manager who is supported by a development team. Enhancements and fixes for domain separation functionality are included with ServiceNow releases and ready to be used by customers. For assistance with domain separation, your instance owners can use Customer Service and Support resources, such as the Service Portal.