Hearted comment

Only the channel owner can give one, and only one per comment. The person who wrote it gets a notification saying their comment was hearted, and a small heart appears on the comment with the channel's profile picture over it. Cheap to give and disproportionately noticed, which is why hearting is the standard move on a comment you have no time to answer properly.

Two things worth knowing. A heart is separate from pinning, so getting one comment to the top of the section still takes a pin. And a heart on a hostile comment reads to everyone as agreement, so pick carefully.