what are 3 advantages of a mail merge?

Answer 1

The advantages of mail merge compared to what? Using labels?
1) With mail merge, you can add much more than address fields - you can personalize the entire letter for every addressee. I've made standard letters that incorporated entire personal statistical analysis.
2) You don't have to stick a label on every letter. That saves time.
3) You don't need a separate program or office stock to make any labels. One less thing that can go wrong.