What can vertex colors be used for

I just figured out the whole vertex paint thing in Blender to UE4 and I used to use these vertex colors in materials in blender, but I don’t really know what can I use vertex colors for in UE4, I always liked vertex colors as they made my life easier, however all I can find when searching UE4 vertex colors is texture painting, which is nice but not really what I will be using, so can someone tell me what other stuff can be made by them, I know this is quite a general question, so excuse me.

Thank you for taking the time to read this.

They can also work to simulate wind, you can multiply the speed of the wind by the vertex colors, so it will only move on the areas you need.