The "Shine" aspect refers to the sweat and oil layers. The zip usually contains presets that allow users to toggle between a dry matte look and a high-gloss, "wet" look.
The popularity of this specific zip file stems from several technical improvements it brings to the VaM engine: VAM-Shine.Go.zip
To see the full effect, it is recommended to use "Invisible Lights" or "Custom Shaders" within the scene to create highlights that catch the new specular maps. Why the Community Prefers "Shine.Go" The "Shine" aspect refers to the sweat and oil layers
Look for the "Shine.Go" presets in the preset browser. Applying this will instantly update the character's skin shaders. VAM-Shine.Go.zip