Packaging technology is first and foremost about packaging products in one or more layers of a packaging material in a way that is safe for transport.
Different groups of goods and types of transport each have different packaging and materials that are used.
The deeper meaning, besides the transportability and safety of the product, is the informability and storability. The packaging should show what is inside. For storability, it is important that as little space as possible is wasted, but as many packages as possible can be stored.