A meta-analysis is a research method that combines the results of multiple studies to draw a more comprehensive conclusion about a specific topic. By analyzing data from various sources, researchers can identify patterns, strengths, and weaknesses that may not be evident in individual studies. This approach helps to increase the overall reliability of findings and provides a clearer picture of the evidence. In fields like medicine, psychology, and social sciences, meta-analysis is particularly valuable. For example, when evaluating the effectiveness of a new drug, researchers can pool results from several clinical trials to determine its overall impact. This method allows for better-informed decisions and enhances the understanding of complex issues.