WP Document Revision is a document management system, a collaboration tool, and a secure hosting solution.
Benefits of WP Document Revisions
Each file has a persistent URL which is very helpful for revisions. Unlike the Media Library, uploading a new version of the document will maintain the same URL.
Documents have a revision history with the ability to revert back to a previous version. Plus, keep the persistent URL. The persistent URL will always point to the latest version of the document.
Documents have the same visibility options as pages, Public, Private, and Password protected. The Media Library does not have this capability.
Collaboration and WordFlow State
Workflow state identifies the state of the document from In Progress to Final. People can check out a document to review and upload a new version or status of the document.