Question: what are the faces for on snapchat?
Answer: Smiley face – this emoji next to a username means they're one of your best friends on Snapchat. ... 
Smirking face – this means that you are one of that person's best friends, but they're not one of yours (awkward). ... 
Grimacing face – this means that your #1 best friend is their #1 best friend.