How to sell pricier alternative products (upselling)
In order to maximize your revenue, suggesting pricier alternative products is strongly advised for basic items. That way, your customer will spend more time browsing your catalog.
To do so:
Select such Alternative Products in the Sales tab of the product detail form. 3 alternatives are fine! Don’t publish too many otherwise your customers will be confused.
Turn on Alternative Products from the Customize menu of the product web page.