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.
chengl
Highly Voted 3 years, 6 months agoExamDev
Most Recent 10 months, 1 week agoGaurav_9412
1 year, 4 months agomiguel_romero
2 years, 11 months agoBankZenith
3 years ago