Meaning
Here the open grin is paired with eyes squeezed into happy curves, so the whole face looks like it is mid-laugh. It signals real, warm amusement: a joke landed, a memory made you smile, or you are simply in a great mood.
Use it when something is pleasantly funny but not hysterical: “Grandpa just sent his first voice message 😄” It sits between a simple smile and the tears-of-joy face, so it rarely feels sarcastic or over the top. That middle position makes it a safe choice with people you do not know well yet.