Pre-Fractured Geometry is when a model is pre-broken into pieces in a full 3D application. Pieces need to be separate objects but exported in one obj file. You can then import the obj into Element and use the Multi-Object function to separate the pieces. See Multi-Object Mode
for more information on animating fractured geometry.
Using multiple groups to animate a single object
Learn to use pre-fractured objects
Using Animation type to get different looks