I think the other commentators are really understating the extent to which Google beats Microsoft on realtime collaboration. In Office 365 you can see that som

I think the other commentators are really understating the extent to which Google beats Microsoft on realtime collaboration. In Office 365 you can see that someone else has opened the file but you can't see their changes until they Save which is hilariously retro. Google Docs doesn't even have a Save button. In Office if someone else makes a change and saves it you get a popup to merge their changes, or if you save you get a popup to merge your changes with their saves. That's garbage. In Google Docs you and I can edit the same _word_ or even the same character at the same time, with all changes reflected on both sides immediately. No saving, no syncing.