when you click on one a colon and a P will show up in your reply box - but when you hit send, it turns it into a face with eyes & open smile. If there is a dash in between, that represents a nose.
Some do say what they are in words, not symbols.
Try them all & make yourself a cheat chart - we'll enjoy seeing all the faces pop up!
:) :-) :D
smile - smile - bigger smile etc.