The mail merge process creates a sheet of mailing labels that you can print, and each label on the sheet contains an address from the list.
If you want to send a mass mailing to an address list that you maintain in a Microsoft Excel spreadsheet, you can use a Microsoft Word mail merge. Excel for Microsoft 365 Excel for the web Excel 2021 Excel 2019 Excel 2016 Excel 2013 Excel 2010 More.