Unpacks or Repacks docx files so you can work with their XML contents.
Internal metadata/props/refs stored in the files are usually overwritten/lost, when attempting to edit such docx documents with Microsoft Word
Unpacking and repacking the docx files (just a glorified zip archive) allows one to make bulk edits to the docx files by for example search and replacing string content or images stored within the document. Updating the docx files like this also has the benefit of maintaining any internal metadata, unlike Microsoft Word.