Multisampling is a technique used in computer graphics to improve image quality by reducing visual artifacts, such as jagged edges, known as aliasing. It works by taking multiple samples of a pixel's color and averaging them to create a smoother appearance. This process enhances the overall visual fidelity of rendered images, especially in scenes with complex geometry or high contrast. In video games and 3D rendering, multisampling is often implemented to provide a more realistic experience without significantly increasing the computational load. By balancing performance and visual quality, it allows for smoother graphics while maintaining a playable frame rate, making it a popular choice among developers.