The ability for multiple persons to work on the same document is important – for employees working on a sales report to soccer moms creating a flier for a bake sale. For a couple of decades now documents could be sent to others via email or by another means to others. Several office applications allow people to work on a document at the same time.
Many times there are people in a group who receive a document that do not need to edit a document or only edit parts of it. For those situations Microsoft Word and LibreOffice Writer have settings that allow the original creator of a document, or administrator, to make a document read-only, require a password to open it, or to make some sections of it un-editable. Both applications have similar capabilities in this regard. While Word has more protective features, LibreOffice has certain advantages over it.