The Master database contains all published and unpublished content for all publishing targets.
You can host the Master database on:
Refer to the Sitecore compatibility table for compatible versions.
The Master database has its place in the Sitecore reference structure. It can be referenced by other roles, and it can also reference other roles.
The Master database is referenced by the following roles:
The Master database does not reference other roles.
Privacy and security
Assuming default behavior, the Master database does not handle personal data.