Metro areas, or metropolitan areas, are regions that consist of a large city and its surrounding suburbs and towns. These areas are characterized by high population density and economic activity, often serving as cultural and commercial hubs. They typically include various municipalities that are interconnected through transportation and infrastructure. Metro areas can vary in size and population, with some encompassing millions of residents. They often provide essential services, such as education and healthcare, and are home to diverse communities. Examples of well-known metro areas include New York City, Los Angeles, and Chicago.