In groupage the operator collects small shipments from several customers, consolidates them at a hub and loads them onto one truck towards a destination area, where they are distributed again. The customer pays a proportional share of the vehicle.
It is priced per pallet, per loading metre or by weight with a density convention, and the price grows in steps. There is more handling than in a full load, so packaging and labelling matter more, and transit times are less precise.