Most people immediately think of a box when they hear the word 'packaging'. Although not very strange, but a can, a bag, a plastic/glass bottle, or plastic wrapping is also considered packaging. This is primarily intended to protect the products within the packaging and keep everything together.
You can put important product information on the packaging, for example a list of ingredients, a best-before date, a barcode or energy label. Sometimes, that information must be displayed according to certain standards, while conforming to the branding rules and guidelines. Most of the times, the packaging should look attractive and may eve be used to advertise your other products.
All in all, packaging is so much more than a simple box, bottle, label or wrapping.