Urbanization is the movement of people from rural to urban areas, and the result is the growth of cities. It is also a process by which rural areas are transformed into urban areas. Urbanization is a process that has occurred, or is occurring, in nearly every part of the world that humans have inhabited. People move into cities to seek economic opportunities. Urbanization is measured by the percentage of people, who are urban in a society, a region or the world. Urbanization, therefore, summarizes the relationship between the total population and its urban component. That is, it is mostly used as a demographic indicator or in the demographic sense, whereby, there is an increase in the urban population to the total population over a period of time.