A systematic review is a research method that collects and analyzes all available studies on a specific topic to provide a comprehensive overview. Researchers follow a structured process to identify, evaluate, and synthesize findings from various studies, ensuring that their conclusions are based on a wide range of evidence. This approach helps eliminate bias and provides a clearer understanding of the topic, making it easier for others to make informed decisions. These reviews are particularly valuable in fields like healthcare and social sciences, where they can guide policy-making and clinical practices. By summarizing existing research, systematic reviews help identify gaps in knowledge and suggest areas for future study.