"Nè" it's a typical expression of northern
Italy.
It has no precise meaning. It can be used to emphasize the sentence. It can be compared to the
English "do you
understand?", "is it true?" or "Didn't you?" in a context where who says "nè" is expecting an affirmative answer.
"Tra poco fai i compiti, nè!"
"you have to do your laundry soon, do you understand?"
"Sei già andato a prendere il pane, nè?"
"You have already
gone to get the bread, didn't you?"
"La
Carla è stupida, nè?"
"
Carla is stupid, Isn't she?"