The process of mail merge is creating personalized letters and pre-addressed envelopes or mailing labels for mass mailing from a form letter. The feature is usually employed in a word processing document which contains fixed text and variables.

Mail merge is a feature within most data processing applications that enables users to send a similar letter or document to multiple recipients. It enables connecting a single form template with a data source that contains information about the recipient’s name, address and other predefined and supporting data.

The feature of mail merge is word can help organizations produce various forms of written communication more effectively.