The packaging group is used for Freight charge calculation.
Both UPS and Fedex base the freight charge on number of packages.
The packaging group is a number that indicates how many of a product that will fit a box.
The packaging group is held on the product record, see Products.
E.g. a product has a packging group with number 24.
A customer places an order for 48 items.
The shipping charge API, will request a quote for 2 boxes to be shipped. ( 48 / 24 = 2 ) .
Important: If the site use UPS or Fedex rate API, then all products must have a packaging groups. If the packaging group is Zero ( or NULL) , the shipping charge calculation will be invalid.
See also: Product, Shipping Charge API