Okay kiddo, have you heard of the movie Space Odyssey? In that movie, there is something called a monolith. A monolith is a big, black, rectangular thing that appears in different parts of the movie.
The monolith is special because it seems to have a lot of power and knowledge. It helps aliens or beings called "the creators" make life on Earth possible.
Later in the movie, humans discover another monolith on the moon. This monolith leads them to find another one near Jupiter. When they get closer to the Jupiter monolith, strange things happen, like time passing differently and strange visions.
So it seems like the monolith is a super powerful object that has some control over time and space. We don't know much about it, but it's definitely important in the Space Odyssey movie.