Extra nodes are group nodes made for the Geometry Nodes of Blender.
Extra Nodes:

• Falloff Nodes
• Field Nodes
  
• Mesh Nodes
• Tracer Nodes
• Particle System Nodes (Procedural Particle System)
• Relaxing Particles
  
• Utility Nodes

To use these nodes as assets:

1. Assign the Extra Nodes Folder:

   • In Blender Preferences, set the Extra Nodes folder as an Asset Library.

2. Access the Nodes:

   • The nodes will appear in the Asset Browser under the KS Extra Nodes category.
   • They will also be available in the Add menu of Geometry Nodes under KS Extra Nodes.