Demographers are experts who study populations, focusing on their size, distribution, and trends over time. They analyze data related to birth rates, death rates, migration patterns, and aging, helping to understand how these factors affect society. Their work is essential for planning in areas like healthcare, education, and urban development. Using statistical methods, demographers create models and forecasts that inform policymakers and researchers. They often collaborate with organizations such as the United Nations and World Bank to provide insights on global population issues. Their findings can influence decisions on resource allocation and social services.