In the backend, while adding/editing a product you can link another product(s) to it under the LInked Products tab by finding required products and assigning them to the original product.
As a result the customer purchases this product together with the linked product(s) and does not see this linked product(s) while making the order until it is displayed in the invoice and in the packing slip.
The linked product(s) is displayed on the order page while an order is processed in the backend. Once such an order is made the stock is updated accordingly for both linked product(s) and the original product at the same time.
Thus the purpose of this module is to provide a customer with the linked products while only the original product is paid so a customer feels like the free products are given. For example, a customer purchases a headlight (original product) and gets the required bulbs (linked products) for it for free.
This module is used in the backend only.
Widgets and pages:
No widgets and pages are added to this module.