This tutorial explains how to generate a document using an Excel Spreadsheet as the source of data. Mail Merge can be used to create multiple documents at once, each personalized by a row of data from the Excel Spreadsheet.
Once a template has been chosen, expand the Data Source section and click the Excel icon:
Drag and drop the Excel Spreadsheet file onto the page. Alternately, use the Click to Upload button to open a file browser window.
Expand the Deliver Method section and click Download to begin the document generation process.