In today's competitive market, it's hard to attract a consumer's attention. Studies show the average consumer spends less than a second scanning shelves to make a decision on whether or not to purchase a product.
You want to make sure that in moment, the consumer will notice your product, analyze it, and decide to purchase it. Whether it's a new product launch or a redesign of an existing brand, you'd be smart to invest in your packaging design to ensure that your target audience will notice you. Products are generally not allowed to remain on the shelves very long unless they sell. Because of the competition, you've got to do a lot more to attract a customer.
The discipline of package design focuses on producing a container that will get noticed. Regardless of how useful the product may be, unless a consumer sees it against the competition and decides to pick it up, that product will never sell.