The Guide represents a milestone in the efforts of the United Nations Human Settlements Programme to monitor the Millennium Development Goals adopted by the UN members states in the year 2000. UN-HABITAT has been assigned the responsibility to assist governments in monitoring and eventually attaining the global “Cities without Slums” Target of improving the lives of at least 100 million slum dwellers. This guide offers not only the definition related to urban poverty and slums but also a hierarchy of indicators at the operational level and specific ways to measure them.