ELI5: Explain Like I'm 5

Built-up area

Built-up area is a place where there are a lot of buildings and other structures like streets and parks. This can be a big city like New York City or a small town. In a built-up area, there are places like homes where people live and stores where people can buy things. There might also be places to play, like parks or playgrounds. Built-up areas often have lots of people and activities.