However, while formal employment presents better opportunities to the employed population, informal employment provides essential income to most. Due to a high rate of population growth and urbanisation, Indonesia has a huge labour force, especially in urban areas, which can be absorbed in the labour market through informal employment. On the other hand, to survive, the poor tend to have to take on any kind of activity even if a job is characterised by a very low wages, irregular working hours, uncertain job tenure, and other similar conditions. These links between the informal sector and the poor mean it is important to learn more about the different aspects of the sector, such as its production processes, the social, economic, and demographic characteristics of its employment population, and the enterprises that compose it.