Okay kiddo, let me tell you about something called the hilbert scheme. Imagine you have a big box of toys and you want to organize them in a specific way. Maybe you want all the cars to be in one pile and all the dolls in another. Well, mathematicians also like to organize things in a specific way, but instead of toys, they're organizing shapes and other mathematical objects.
The hilbert scheme is a special kind of organization that mathematicians use when they want to group together a bunch of different shapes that look alike. They do this by looking at the equations that describe those shapes. For example, imagine they're looking at all the different circles that you can draw on a flat piece of paper. Each circle can be described by an equation, which tells you exactly how to draw it.
Now, sometimes there are different equations that describe the same circle. Maybe one equation tells you to move the center of the circle up a little bit, but the shape is still the same as if you left it in the middle. So, if mathematicians want to group together all the circles that look alike, they need to consider all the different equations that describe each circle.
The hilbert scheme is the way that mathematicians organize all the different equations that describe circles (or any other shape, really) that look alike. They put all the equations into groups based on which circles they describe. This way, they can study all the circles that look alike together and learn more about them.
So, the hilbert scheme is just a fancy way for mathematicians to organize shapes based on the equations that describe them. It's kind of like putting all your toys that are the same color in one pile, except it's for shapes and equations.