Question tags are used in conversation to get a (positive) reaction from the person you are talking to.
Affirmative statement Negative tag
She is dancing, isn’t she?
You are reading, aren’t you?
She likes fast food, doesn’t she?
You talk too much, don’t you?
Negative statement Affirmative tag
He isn’t working, is he?
They aren’t skating, are they?
She doesn’t like it, does she?
You don’t stop it, do you?