On the thumbnails of the assets you can see differents icons :
The material requires UV unwrap
The material or the layer use bump only
The material or the layer use bump and displacement
The material or layer has been thought to work on a surface (walls, ground, windows…)
The material or layer has been thought to work on an object (tables, cars…)
The material or layer has been thought to work on both objects and surfaces
The layer is coordinated by an empty (use the append method to import the asset)