A product rule in CPQ is part of an automated process that helps configure products and services to meet customer requirements. It applies business rules and logic to selecting a product or service, including pricing, discounts, availability, taxes, shipping options, etc. The product rule engine allows customers to quickly configure a product or service based on their individual needs. Product rules also help reduce the time it takes for employees to configure options for customers manually. Product rules are used in many industries, such as manufacturing and retail. They enable businesses to easily set up complex configurations that ensure compliance with industry standards and regulations. Product rules can be used in conjunction with other CPQ features such as order entry automation, contract management systems, catalog management systems, analytics tools, and more. These features can streamline the sales process by providing customers with accurate quotes quickly and efficiently.