The Color to UVW node is used to transform color data into UVW data that can then be used as UVW coordinates for another texture map (figure 1). The Color to UVW node does not have any additional parameters other than the Texture input pin.
Figure 1: A Color to UVW node is converting a Fractal Noise node data into UVW coordinates which is then used to alter a Checks texture node's UVW coordinates