A Geometry Group nodes collates individual Geometry nodes to assemble a scene or parts of the scene (figure 1). This node can be found under Geometry > Utility in the Node Graph Editor window 


geometry group


Figure 1: The Geometry Group node used to add three geometry primitive objects to the scene



By default, a Geometry group node has two inputs, but you can increase or decrease the amount of inputs. The Add Input button adds a new Geometry input to the end. The Remove Input button removes the last Geometry input.