Meaning
A yellow face with wide open eyes and a pink tongue sticking straight out of an open smile. Literally it is someone sticking their tongue out.
It is playful and cheeky, used for light teasing, joking around or showing you are not being serious. It can also mean something tastes good. Compare 😜 with a wink and 😝 with squeezed eyes. Example: “Told you I’d beat you at badminton 😛”.