What does supercities mean?

"Supercities" refers to large urban areas characterized by extensive economic, cultural, and infrastructural development, often with populations exceeding several million inhabitants. These cities typically serve as major hubs for finance, technology, and innovation, attracting global talent and investment. They often exhibit advanced transportation systems, diverse industries, and a high quality of life, but may also face challenges such as congestion, pollution, and social inequality. The term highlights the growing influence and interconnectedness of urban centers in a globalized world.