Hello there little one! Do you know what geometry is? It's the study of shapes and how they relate to each other.
Now, take that idea of shapes and apply it to something that changes over time, like the movement of a bird flying in the sky. Stochastic differential geometry studies how shapes change over time in a random or unpredictable way.
Imagine you are playing with a ball that bounces unpredictably around the room. This is called a stochastic process - it behaves randomly or unpredictably. Stochastic differential geometry uses math to understand how shapes can change over time like this, and how they react to these unpredictable movements.
It's a little more complicated than regular geometry, but it helps us better understand things that change over time and don't follow predictable patterns. Does that make sense?