A systematic review is a research method that collects and analyzes multiple studies on a specific topic to provide a comprehensive understanding of the evidence. It follows a structured approach, including defining a clear research question, selecting relevant studies, and assessing their quality. This process helps to minimize bias and ensures that the findings are reliable. Systematic reviews are commonly used in fields like healthcare and social sciences to inform decision-making and policy. By synthesizing results from various studies, they can highlight trends, identify gaps in research, and guide future investigations, making them valuable resources for researchers and practitioners alike.