It brings up something you have heard about the listener and asks them to confirm it, politely: today is your wedding anniversary, right; I hear her birthday is the 22nd; I hear this is not the end. It is the standard way a host opens up a guest's news, and the expected answer is yes. One line uses it about an instruction instead, pointing out that you were the one who told me to talk about sleep paralysis.
Register: polite; interview and conversation openers