Which of the following product types do not require shipping costs?

Virtual products are those that are not tangible items and therefore do not require any shipping costs. This includes products like online courses, digital tickets, or memberships, as they can be delivered electronically. Since these products exist only in digital form, there is no need for physical transportation or shipping, which eliminates any related costs.

On the other hand, physical products require shipping because they must be physically transported to the customer’s location. Gift vouchers could also be considered exempt from shipping in certain contexts, especially if they are delivered via email rather than through traditional mail. Downloadable products, like eBooks or software, would also typically not incur shipping costs, similar to virtual products. However, since the question emphasizes product types in a more general way, virtual products is the most specific and clear answer that aligns directly with not requiring shipping.