For example, a customer wants to buy a certain product. The customer sees a simple product with a volume of 1L. 1L may be too much or expensive for this customer, and the product will not be purchased. Redirect the customer to a parent configurable product where the customer will also see other options, for example, 0.5L or 250ml. Perhaps this is exactly what this customer was looking for. Or maybe the customer wants to buy more to save money. Give the customer the opportunity to buy 5L...