Mail merge is a useful tool that will allow you
to easily produce a set of documents,
such as a form letter that is sent to many customers.
Each document has the same kind of information,
yet some of the content is unique.
For example, in letters to your customers,
you can personalize each letter to
address each customer by name.
The information in each letter comes
from entries in a data source for example a spreadsheet.
If you already have an existing address list, good.
If not create the address list.
This is an example of an address list created in a spreadsheet