Morph targets allow the animator to define an area of an object, move it and then animate (tween) between the two states (un-morphed and morphed). In Carrara the morph targets are keyframe animatable. Therefore you can take advantage of the facilities in the sequencer (such as easing in and out).
The video shows how to use morph targets for animation avoiding Poser figures and using low poly objects instead. The reason I point this technique out for low poly figures is that with some care you can avoid having skeletons attached to your objects.
more at http://www.scififunk.com