It what situations is it appropriate to use "slang" and why? ?

Question

I meant *in.

Answer 1

it is usually considered acceptable to use slang terms when conversing with one's friends who understand the meaning of the terms used.

slang can also be used in the text of a story, poem, or song when it helps convey the flavor of the people, time, setting, etc of the piece.

Answer 2

When you're hangin' out with your buds and shootin' the breeze,

Answer 3

In informal situations, like when you're with friends or family (maybe). You should never use slang when you're writing a paper or doing an interview, or something more formal like that. The only time you could include slang in a paper is in dialogue. Hope that helped.