A review paper is a type of academic article that summarizes and analyzes existing research on a specific topic. Instead of presenting new experimental results, it compiles findings from various studies to provide a comprehensive overview. Review papers help researchers and students understand the current state of knowledge in a field, identify gaps, and suggest future research directions. These papers often categorize and evaluate the literature, highlighting key themes and trends. They can cover a wide range of subjects, from biology to social sciences, and are essential for keeping the scientific community informed about developments in their areas of interest.