When a cigarette burns and water vapour produces why are ice cubes needed?

When a cigarette burns, it produces smoke, which contains various harmful chemicals and water vapor. Ice cubes can be used in a smoking device, like a bong, to cool down the smoke before inhalation, making it less harsh on the throat and lungs. The cold temperature helps condense some of the water vapor and other substances, potentially filtering out some impurities and providing a smoother smoking experience.