Private preview is typically an invitation-only offering, though sometimes you can register to be part of a private preview. If you're an enterprise customer, you also may be nominated by your sales account team. Private previews are the very earliest stage of availability, where the capability and stability of a product may be fluid and undergoing a lot of change. Services that are in private preview should never be considered production-ready. If you are participating in a private preview, you may have the ability to give developer feedback directly. Products in private preview may not be fully compliant or suitable for users in highly regulated industries, such as the financial or public sectors. It is important to verify what controls and protections are in place to ensure that your use of a service in private preview doesn't introduce unnecessary risk to your organization.