Polygon reduction is a process used in computer graphics to decrease the number of polygons in a 3D model. This technique helps improve performance and rendering speed, especially in real-time applications like video games and virtual reality. By simplifying complex models, developers can ensure smoother experiences without sacrificing too much visual quality. The main goal of polygon reduction is to maintain the essential shape and details of the original model while reducing its complexity. Various algorithms, such as Quadric Error Metrics and Vertex Clustering, are employed to achieve this balance, making it easier to manage and display 3D objects efficiently.