To clarify, Mail Merge in Word is a tool to take information from a data source and insert that information into a Word document. If the data source has multiple records, Mail Merge can create multiple documents, each with information to reflect the particular record. It can also just pick the information from one or selected records to insert.

The only thing it has to do with mail or email is the name of the tool. (It was designed to handle bulk mailings but that is far from its only use.)

Paul is an expert in its use. There is a separate (branch) forum for the nuances of using Mail Merge.