A metropolitan area, often referred to as a metro area or just Metro, is a region consisting of a city and its suburbs, characterized by high population density and numerous opportunities for employment, education, healthcare, and entertainment. Metropolitan areas are usually home to a large number of people and have significant impacts on regional, national, and global economies, cultures, environments, and politics. The term "metropolitan area" is generally used in the United States and Canada, while other countries may use different terms such as urban area or metropolis.