Data shares utilize secure views for sharing view objects, which ensures that the sensitive information is protected while sharing. This feature allows for controlled and secure access to the shared data, making it possible for only authorized users to view the data. Full DML operations are not supported in data shares as the data is shared in a read-only format. Additionally, data shares do not work by copying data to consumer accounts; instead, they provide access to the data without physical duplication. Data shares are also not inherently cloud agnostic or able to cross regions by default.