In Word Mail Merge is a powerful feature. With Mail Merge Word documents can be used to produce letters, labels, envelopes, and more.
Now you'll need an address list so Word can automatically place each address into the document. The list can be in an existing file, such as an Excel workbook, or you can type a new address list from within the Mail Merge Wizard.
If you don't have an existing address list, you can click the Type a new list button and click Create, then type your address list manually.