Secondary packaging refers to the outer layer of packaging that contains and protects the primary packaging of a product. It is designed to provide additional protection during storage, transportation, and display, while also serving as a means of branding and marketing for the product. This type of packaging is typically made from materials such as cardboard, plastic, or paperboard and is often used to group multiple units of a product together. Unlike primary packaging, which is in direct contact with the product, secondary packaging is not essential for the functionality of the product but plays a crucial role in ensuring its safe and attractive presentation to consumers.