'Track Changes' did not integrate with Google Docs when a Microsoft Word document was uploaded to Google Drive, so all edits would be lost and it made more sense to work outside of the Google ecosystem. 'Track Changes' in Microsoft Word shows edits made to a document so that the person you are submitting the document to can understand what has changed, and can accept or reject your edits either all at once or piece by piece. One of the best arguments against using Google Docs for many people and businesses has been the inability to work with Microsoft Word's 'Track Changes' function.
