The mail merge is a function that allows the user to send a document or a letter to many people at the same time. The user creates a single document with the information that will be the same for all receivers and then add placeholders that will make the document seem unique to each person who will receive it.
When used wisely mail merge will improve your productivity greatly. It is done in 4 easy steps: create a main document, create a data source, add the merge fields into the main document, merge the data with the main document. With it you can easily create letters, envelopes, inventories, catalogs and so on.
