This educational video provides a comprehensive introduction to Urban Geography, exploring how cities form, grow, and function within global systems. It begins by examining the historical and modern significance of cities, using Guangzhou, China, as a primary case study to illustrate rapid urbanization and the transition from agrarian to industrial economies. The video defines critical terminology such as megacities, metacities, and megalopolises, while explaining the challenges geographers face in creating a universal definition for "urban" areas.