Mesh Optimization is a process used in computer graphics and 3D modeling to improve the quality and efficiency of a mesh, which is a collection of vertices, edges, and faces that defines the shape of a 3D object. The goal is to reduce the number of polygons while maintaining visual fidelity, making it easier to render and manipulate in real-time applications like video games and simulations. This technique often involves simplifying complex models by removing unnecessary details or merging similar elements. By optimizing the mesh, developers can enhance performance, reduce memory usage, and ensure smoother interactions in virtual environments, ultimately leading to a better user experience.