The tripple switch node is useful when you want to change a limited number of properties of a material and want the objects to share the other properties.

Here is how you set it up:

• Create a material
• Create a tripple switch node
• connect the tripple switch to a property with three inputs, like color.
• assign the shader to the objects
• in the tripple switch node, press add surfaces
• in the in tripple input, add nodes that you want to feed to the switched propery.