The document discusses 30 key concepts for urban development that are important for professional discussions at urban planning forums. It begins with definitions of several concepts like "aerotropolis," "agglomeration," and "brownfield" to establish common vocabulary. It then discusses concepts related to different sections at the Moscow Urban Forum like "finance & governance," "infrastructure & technologies," and "planning & housing." The document aims to enlarge the vocabulary around urban development in order to improve urban planning and management.