Hello Its.nreal, Thanks for the question. I didn't really catch your first question. Please specify a question and we would be happy to assist. If you read our tutorial, Introduction to Cart Rules, you'll find that cart rules are actually defined as vouchers, gift cards, and price discount. You would need to assign them to your customers so that they could use them. They get a code and will have an option to use it during check out in the cart. You may also want to consider using a Catalog price rule to apply to a certain manufacturer, supplier, attribute or feature of a product. I hope that helps to answer your question. If you still have questions, please let us know. Regards, Arnel C.