When you open a document from a document library in Word, Excel, or PowerPoint, you can edit and update these document library properties by clicking File > Info.
Word then displays the Properties dialog box for your document, and you can use the different tabs to view the information maintained. In addition to the standard properties maintained by Word, you can create your own custom document properties.
One helpful feature in Microsoft Word is the company document property field, which lets you add important information about your document. These particulars may include author names, document titles, or custom titles.