The MongoDB database provides a security feature called Read-only Views (ROVs) that enables administrators to define a query that is materialized at runtime, allowing for separation between data and users. ROVs do not store data and are considered first-class objects in MongoDB, enabling administrators to define permissions on who can access the views. By creating a view, defining roles, and granting access to these roles, developers can implement least privilege software architecture, ensuring that users have only the necessary access to sensitive data. The feature supports security by providing a layer of abstraction between the user requesting the data and the underlying data, reducing the risk of unauthorized access.