The monkey emoji is a picture of an anthropomorphic monkey’s face with its mouth open. It is generally used to represent mischievousness, lightheartedness, or good luck. Sometimes it is used to represent the feeling of being too curious for one’s own good, or the feeling of monkey business.
It can also be seen as a humorous way to indicate silliness or pranks. In some cases, it may even be used to indicate sympathy or solidarity.