We have a notion about when two geometric objects e.g., triangles, rectangles, parallelograms, and ellipses are similar. Can we make measurements of the objects so we can exactly determine when two objects are similar?  Such measurements are called moduli. Collecting all the moduli together into a moduli space allows us to talk about all the objects at once. In this talk we will start off with moduli spaces of simple objects and then move on on to  moduli spaces of more complex geometric objects such as Riemann surfaces.