Population movement refers to the large-scale movement of groups of people. It includes migration within countries and across borders. This movement can happen for many different reasons.

People may move for work, safety, education, or environmental changes. Some movements are voluntary, while others are forced. These movements can involve thousands or even millions of people over time.

Population movement is measured using census records, surveys, and migration data. It is studied in geography and demography to understand how populations change.