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.
examlog
Highly Voted 1 year, 3 months agoChiquitabandita
Most Recent 4 months agoSpTester
6 months, 2 weeks ago9smiles
10 months, 4 weeks agoDavina07
1 year, 1 month ago