A child product is a kind of product that has some sorts of parent product such as spin-off or used asset.
You can register your own product as a child product to a public parent product. Once registered, the product details page will start to display information about the parent product, while it is listed on the product details page of the parent product.
If the parent product has a dividend requirement, a predetermined portion of the sale proceeds will be distributed to the parent product when the child product is sold.
For details, please refer to "What is a distribution to the parent product?" for details.