The document discusses Microsoft Word's mail merge feature and provides an example of how to use it. Mail merge allows a user to create customized form letters by merging contact information from an Access database into placeholder fields in a Word template letter. The user selects the data source, inserts merge fields into the Word template, previews the customized letters, and then prints or saves all of the merged letters in one document. Mail merge can also use a Word table or Access query as the data source instead of an Access table.