Population projections are estimates of how a population may change in the future based on current trends in births, deaths, and migration. They are not predictions, but scenarios that show what could happen if theorised patterns continue. Projections help governments, planners, and communities understand likely changes in population size, age structure, and geographic distribution. Population projections support long-term planning for housing, schools, health services, transport, and workforce needs. By exploring different projection scenarios, decision makers can prepare for a range of possible futures.