Use it to show you're pleasantly surprised by new, interesting information.

Show Surprise

Seek confirmation or further proof of what's just been stated.

Confirmation Plea

If used too often, it could make you sound insincere or not genuinely interested.

It's a way to politely indicate that you are skeptical or doubt the truth of a claim.

Your sarcastic tone suggests disbelief without directly challenging someone.

Can be used to mock exaggeration or a story that sounds too good to be true.