When collaborating on a document with several people, leaving comments is an essential part of the process. You can print the document along with comments, but what if you want you print just the comments? You can do that.
Why would you want to print out only the comments on a document? There are several reasons. Maybe you just want a hard copy of the comments you can preserve for your records. Or maybe you want to sit down with collaborators as a group and look at the document and the comments separately. After all, a printed page full of edits and comments can be a little overwhelming. Whatever your reason, Word makes it easy to do.