To write a quality comment first, you should specify the thing you are commenting about. Second, you should compliment the writer on their writing and not write anything vulgar, or do not write something like “ This post is so cool, Awesome .” You should also use the writer’s name. Most importantly, you should check for correct punctuation, spaces, and writing. You also don’t want to write about your birthday, full name, address, or passwords. This is what you should do to write a quality comment.