Quantitative research plays a vital role in policy making because it provides objective, measurable, and statistically reliable evidence for designing, implementing, and evaluating public policies. In Social Work Research, policy decisions directly affect the well-being of individuals, families, groups, and communities. Therefore, policies should be based on factual data rather than assumptions or personal opinions. Quantitative research helps policymakers understand the nature and extent of social problems by collecting numerical data from large populations through surveys, censuses, questionnaires, structured interviews, and official records. One of the major contributions of quantitative research is the identification of the magnitude of social issues. It measures the prevalence, incidence, and distribution of problems such as poverty, unemployment, domestic violence, child labour, substance abuse, homelessness, and health inequalities. For example, a nationwide survey may reveal that a significant percentage of children in rural areas are out of school. Such statistical evidence enables the government to formulate targeted educational policies and allocate resources where they are most needed. Quantitative research also supports evidence-based policy making.