1. Product price rules

   Product price rules are applied to the product when it's added to the cart. That means that the product price rule cannot be dependent on the conditions in the cart. 

Product price rules can also be applied to product labels when printing through the system and the discount can be displayed in the online catalog if website integration is used.

2. Cart rules

   Cart rules are applied to the whole cart, so they are reapplied each time something changes in the cart. Further subtypes are:

2.1 Cart item rule - applies to a single cart item and is calculated based on conditions of that particular item in the cart.

2.2 All cart items - conditions determining applicability of the rule are based on the whole cart.