What is a region based on connections like trade or communication?

A region based on connections like trade or communication is often referred to as a "functional region." These regions are defined not by physical boundaries, but by the interactions and relationships among the areas involved, such as trade networks, transportation routes, or communication links. For example, a metropolitan area can be seen as a functional region where economic activities and social interactions are interconnected, driving growth and development. Such regions highlight the significance of connectivity in shaping economic and social dynamics.