Before a final version of a document is shared with other people, the Mark as Final option can be used to make the document read-only. The Mark as Final option is used to prevent changes to the final version of a document. When a document is marked as final, its typing, editing commands, and proofing marks are disabled and the document becomes read-only. We cannot say that Mark as Final option is a security feature because anyone can edit a document that is marked as final by turning off Mark as Final.
