A fixed-page copy changes how revisions work
DOC is an editable word-processing document; PDF presents pages for reading and distribution. The PDF is useful when recipients should see a consistent layout, but ordinary text edits, styles, and document structure are no longer available in the same way.
Keep the DOC as the source when future revision is expected. Before making a distribution copy, decide whether comments, tracked changes, hidden text, or draft material should appear. A page export can reveal review content if the document's display settings or conversion path include it.