Continuing the tradition of goofy names for cool tools, we introduce the Smoother (What's next ? The Jiggler and Tumbler?) The Smoother is used quite often in conjunction with Motion Sketch as sketching creates a lot of keyframes. You can also use it to reduce other generated keyframes from the Wiggler or Third Party Assistants.
On the layer you just motion sketched, click the position property name to select all of the position keyframes.
Go to Window>The Smoother. In this case you'll be smoothing the spatial path but the smoother can also be used on temporal keyframes like Opacity or Rotation.
The tolerance defines how great (in pixels) the smoothed keyframes can vary from the original path. The higher the tolerance, the smoother the path. You may want to repeat the smoothing multiple times at a low value until the desired result is achieved.