Binary Space Partitioning (BSP) is a technique used in computer graphics, specifically in rendering 3D scenes or levels. It involves recursively dividing a 3D space into smaller and smaller partitions using planes until each partition contains only one polygon or object. BSP trees are then used to efficiently determine which polygons should be rendered or hidden, depending on the viewer's position in the scene. BSP is a specialized skill that requires knowledge of algorithms, geometry, and graphics programming.