What is ngan in Mahjong?

In Mahjong, "ngan" refers to a scoring element associated with certain winning hands. Specifically, it denotes a hand that contains a specific combination of tiles, often requiring a player to have a complete set of melds and pairs. The term can also relate to the concept of "pung" or "chow," where players aim to form specific groupings of tiles for points. Understanding "ngan" is crucial for strategizing and maximizing scores during gameplay.