That very simple and obvious because any time you making any post you have emojis staring at you even when you where creating this thread. You actually got alot of things to learn in this forum so try taking your time to understand how the system work. Or you could just click the help icon It would help alot... This link would also be a help to you link below
https://bitcointalk.org/index.php?action=help;page=post#smileysref