This shows different target faces and distances, to scale. You can drag the targets around to line them up and compare them. It allows you to visualize the relative difficulty of the various distances and faces.
The green thing near the bottom is just for recurve and compound. It’s meant to represent your sight pin and ring. You can drag it over a target, and you can adjust the diameters with the slider at the bottom to best represent your sight picture on a target you are familiar with.
Note that this can only show an equivalence in terms of the angle subtended by the target at a certain distance. The handicap tables take in to account other extra factors like wind that will have a greater effect over longer distances, but in terms of “what you see” the graphics below are reasonably accurate.