How do the added products stats work?

They display the number of products added to the cart directly or indirectly (after being clicked on). 

A product can be added to the shopping cart directly from the app widget or from the product page after going there by clicking on the product displayed by the app. 

This count includes both cases. 

Repetitions are not excluded, a product is counted as many times as it is added to the cart by a customer.