A systematic review is a research method used to gather and analyze all available studies on a specific topic. It aims to provide a comprehensive overview by following a structured approach, ensuring that the review is thorough and unbiased. Researchers collect data from various sources, such as academic journals and databases, to evaluate the effectiveness of treatments or interventions, like those related to healthcare or education. The process involves clearly defined steps, including formulating a research question, selecting relevant studies, and assessing their quality. By synthesizing the findings, a systematic review helps inform decision-making and guides future research, making it a valuable tool in fields like medicine and social sciences.