In real-time computer graphics, geometry instancing is the practice of rendering multiple copies of the same mesh in a scene at once.

How does instanced rendering work?

Instancing is a technique where we draw many (equal mesh data) objects at once with a single render call, saving us all the CPU -> GPU communications each time we need to render an object. ... We sent all the required data to the GPU once, and then tell the GPU how it should draw all these instances with a single call.

Is GPU instancing good?

GPU Instancing can reduce the number of draw calls used per Scene. This significantly improves the rendering performance of your project.