Geometric graph theory is a type of mathematics that studies how shapes and lines fit together. It's like connecting pieces of a jigsaw puzzle together in a way that makes sense.
Think about when you are playing a game and have to draw a shape with lots of lines connecting different points. You have to decide how to draw the lines between the points and make sure that they come together in the right order, so that all the points stay connected. That's more or less what geometric graph theory is all about.
It looks at how shapes and lines work together and tries to predict what will happen to the shapes and lines when they are changed. Geometric graph theory helps scientists and engineers figure out the best way to build something, like a bridge or a skyscraper. It also helps us understand nature, like predicting how animals will move or how storms will behave.