This chapter discusses different types of human movement including cyclic, periodic, and migratory movement. It defines migration as permanent relocation across significant distances, distinguishing between international and internal migration. Push and pull factors that influence voluntary migration are explored, including economic, political, environmental, and social reasons for why people migrate. The chapter also examines where people migrate, including global, regional, and national migration flows, as well as the special circumstances around refugees. Governments can influence migration through establishing legal restrictions and policies around immigration and borders.