This document provides a 3-step tutorial for using mail merge in Microsoft Word to send personalized letters to multiple recipients using data from an Excel spreadsheet. Step 1 involves gathering contact information for recipients in an Excel file with separate columns for name, address, etc. Step 2 is writing the main letter text in Word, leaving placeholders for the personalized fields. Step 3 walks through using Word's mail merge wizard to link to the Excel data, preview merged letters, and print or edit the individual letters. The mail merge automatically populates the name, date, and other fields for each recipient.