A packaging insert is an additional item that ecommerce retailers can put into shipments before sending them off to customers, and they're a great way to level up your shipping and fulfillment strategy. Packaging inserts (also referred to as packing inserts) are usually unexpected and can build goodwill with new customers. Customers don’t have to pay anything extra for a packaging insert. Instead, a packaging insert is something that a brand will use to spread awareness about campaigns and promotions and provide added value. Overall, package inserts are a cost-effective and versatile gesture for building a relationship with your customers.