Okay, so imagine that there's a big, dark cave that goes really deep into the ground. It's so deep that no one knows what's at the bottom. Some people believe that there are special creatures that live in this cave that are like gods. These creatures are called cavern deities.
People believe that the cavern deities have powers that help them control the underworld. The underworld is like a different world that's underground where these creatures and other things live.
People worship the cavern deities because they think that they can help them in their lives. Some people think that they can make them healthy or help them find what they're looking for.
However, not everyone believes in cavern deities, and some people think that they're just stories.