Metropolitan municipalities are large urban areas that encompass a city and its surrounding suburbs or towns. They are designed to manage and provide services for a significant population, often exceeding one million residents. These municipalities typically have a unified government structure that oversees various functions such as transportation, housing, and public safety. In many countries, metropolitan municipalities aim to promote efficient governance and resource allocation. They often collaborate with local governments to address regional issues like economic development, environmental sustainability, and infrastructure planning. Examples of such municipalities include Los Angeles County in the United States and Greater London in the United Kingdom.