What does interface{} mean in Go and how to use it correctly?

Hello everyone! I just started learning Go, and I'm confused by the `interface{}` construct. I encounter it everywhere: in functions, in data structures, in arguments.\n\nFor example, I've seen code like this:\n\n```go\nfunc PrintAnything(v interface{}) {\n fmt.Println(v)\n}\n\nfunc main() {\n PrintAnything(42)\n PrintAnything("hello")\n PrintAnything([]int{1,2,3})\n}\n```\n\nI understand that this is some kind of "empty interface", but I don't fully grasp its meaning. So, `interface{}` can store a value of any type? But then how is it different from `Object` in Java or `void*` in C? And if I pass something to a function as `interface{}`, how do I get the original type back?\n\nAlso, I often see declarations like `map[string]interface{}` or `[]interface{}`. Does this mean I can store both strings and numbers in a single slice?