Housing is a multidisciplinary field that fulfills basic human needs. It includes concepts like houses, settlements, built environments, and communities. National housing policies aim to make housing accessible to all income groups through strategies like increasing affordable land and housing supply, improving existing slums, and mobilizing financial resources. These policies address issues related to land, infrastructure, building materials, techniques, and finance. The goals of Habitat III include creating an integrated housing framework, adopting an inclusive approach, expanding affordable housing, improving housing conditions, and upgrading informal settlements through coordinated efforts across different levels of government.