I have no idea. I'm emoticon clueless.
I've never used it because it's meaning was never clear to me.
Now I know, and it's a positive.
Even with specs, my eyesight isn't very good, so I find it hard to distinguish one of those little emoticons from another. For that reason I usually just skip over them. Sorry.
Pity they don't make them a bit bigger ... Like these from Samsung.