"Let’s say that you need to send out an
invitation to every person in your mailing list, thanking them for
coming to an event. You make sure you’ve got the data set up
correctly in a database, and you create a letter saying what you
want to say. Then you display the database, you pull in a few
fields from it like the name, city, or whatever specific
information about each person that you need in the letter. Then you
print the letter, choosing all the people or just specific people,
and you get a copy for each one.
"If you want to use the letter again, you just open it up again
and print it again, specifying either all the people in the
database, or just the ones you want.
"To add people to the database, you just open up the
spreadsheet, or the text file or other data source where the data
is stored, and add them there. The mail merge document will be able
to pick up on the new data as well as all the old data the next
time you print."