A systematic review is a type of research study that involves systematically collecting, analyzing, and synthesizing existing research on a specific topic. It aims to provide a comprehensive and unbiased summary of the available evidence on a particular research question by identifying and evaluating all relevant studies in a rigorous and transparent manner. Systematic reviews typically use a predefined protocol to ensure the review process is standardized and reproducible. They are considered a valuable source of evidence for informing decision-making in various fields, including healthcare, social sciences, and education.