This is the "smiley face" that can be used in any scenario. Most commonly known as a "laughy face", can be used when someone says something funny or awkward! In all cases, its the face of a thousand meanings!
John: Hey are you going to the cinema? :L
Kate: no :L but i hear the film is really funny!! :L
John: i hope so, or ill die of boredom!
Kate: hahaha :L