A hub, or center, is a focal point where various activities, services, or resources converge. It serves as a central location that facilitates connections and interactions among people, organizations, or systems. Hubs can be physical spaces, like community centers or transportation hubs, or virtual platforms, such as online forums or networks. In urban planning, a hub often refers to areas designed to enhance accessibility and promote social engagement. Examples include transportation hubs like train stations, which connect different modes of travel, or innovation hubs that bring together startups and investors to foster collaboration and growth.