In e-commerce marketing, trigger products are used to enhance purchase decisions or upsell and cross-sell another item. It is a promotional tool in marketing.
For example, when trying to improve sales for a slow-moving product and you want to use cart upsell as a means of promoting the product. When a customer adds item A and gets to see another product B displayed in their cart, this is how the trigger product works.
Item A here is the trigger product.
To get that item displayed in customers’ carts, will mean using software that automatically displays the product in customers’ carts when they add the trigger product.