Migration is a process that has been ever-present among humans since their earliest days and has persisted to modern times. The basic reasons for migration are the same both in the past and nowadays, though as time has progressed, there have been more and more reasons for it. Migration can be divided into immigration and emigration.
Immigration is a process when people move into another place/country, while emigration is a process when people move out from a place/country. The immigration process is most prevalent in high-income countries as they offer the best living conditions, so they are the most attractive. The low-income countries have large-scale emigration and little to no immigration because the living conditions are not good.
