Mail merge for Google Docs ™ - Google Workspace Marketplace Apr 07, 2022 · Placeholders--called merge fields--tell Google Docs ™ where in the document to include information from the data source. That way, it’s possible to mail merge emails, letters, envelopes or labels. HOW DO I CREATE A MAIL MERGE DOCUMENT IN GOOGLE DOCS ™? 1. Open Google Docs ™ ( ) 2. Create a template document.