When Office app closes unexpectedly before you save your most recent changes, Document Recovery automatically opens the next time you open the Office app to help you get your file back. Tip: If you are a Microsoft 365 subscriber the safest way to work is to store your files on OneDrive or SharePoint and use AutoSave. More @Wikipedia
Hover over any link to get a description of the article. Please note that search keywords are sometimes hidden within the full article and don't appear in the description or title.