Systematic reviews are a type of research study that involves collecting, synthesizing, and analyzing all available evidence on a particular topic or research question. They follow a rigorous and transparent methodology to ensure that the findings are reliable and unbiased. Systematic reviews typically involve a comprehensive search of the literature, a critical appraisal of the quality of the included studies, and a synthesis of the results. They are often used to inform clinical practice, policy decisions, and future research directions. Systematic reviews are considered to be an important tool in evidence-based medicine and are often published in peer-reviewed journals.