The Cinema 4D Noise node is for using Cinema 4D's Noise shaders. Recent versions of OctaneRender® added OSL versions of the Cinema 4D noises. The Octane Noise node is a native tool and very efficient. For speed and reliability, the Octane Noise node is the better first choice, with the Cinema 4D Noise node as a fallback as needed. More details on what the C4D Noise Shader is and what it does can be found in the Cinema 4D help documentation.
Figure 1: The Cranal Noise Type for a Cinema 4D Noise node connected to the DiffuseAmount of diffusion, or the reflection of light photons at different angles from an uneven or granular surface. Used for dull, non-reflecting materials or mesh emitters. input of a Diffuse materialUsed for dull, non-reflecting materials or mesh emitters.