Each shader comes with a single master node. It can be used directly as the color input (for a black and white look), or as the factor in a Mix Shader node.

Here is how you can use these shaders in your project:

1. With the "Shwifty Shaders 1.0 .blend" file open, select a ball model that has your choice of material, for example, 'Stars'.

2. With the model selected, press 'Ctrl+C' on your keyboard to copy it. Now open your own Blender project and press 'Ctrl+V' to paste that model into your project's viewport.

3. Now that the model has been pasted in your project, the material that was assigned to it (Stars) will become a part of your project as well.

4. Select any of your own 3d model, and in the 'Material Properties' tab, select the material (Stars) from the drop-down menu. Below it, you will find all the settings needed to customize the material to get the desired look.
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5. Taking the 'Stars' shader node for example, this is how it can be used to mix between 2 shaders/ colors.