Animation
An Animation asset is used to play a single animation on a 3D model. Animations are imported by uploading 3D scenes (such as FBX files) which contain animation data. The animation data is extracted from the uploaded file by the asset pipeline and a Target Asset is created to use in game.
Animation Preview
The inspector has a viewer that can be used to preview the animation with any Template or Model asset. This is useful if you have a single animation that can be applied to different character rigs.
There is also a viewer in the Anim State Graph Editor when you select a state in the graph. When selected, all Entities in the scene that are using the graph will show in a list and can be selected for preview.