A voting comment increases the vote count for the chosen answer by one.
Upvoting a comment with a selected answer will also increase the vote count towards that answer by one.
So if you see a comment that you already agree with, you can upvote it instead of posting a new comment.
Bairdy
3 years, 6 months agoAmando
4 years, 2 months agojingchyi87
4 years, 9 months agoHSSSteve
4 years, 8 months ago