A business rules engine (BRE) is a software tool that manages and runs business rules and decision-making processes, enabling companies to stay agile and responsive in today's fast-paced business environment. BREs take the guesswork out of complex decisions by providing consistency across systems and processes, reducing errors, and improving decision-making. They automate rule-based processes, such as employee onboarding and loan application processing, and can be used for logic-based processes like fraud detection and pricing optimization. With a centralized engine, businesses can separate business logic from application code, making it easier to maintain, change quickly to changing needs, and standardize across systems. BREs offer core benefits including improved decision-making, increased efficiency and productivity, enhanced compliance and risk management, greater agility and flexibility, and reduced costs. To choose the best BRE for a business, consider factors such as integration capabilities, ease of use, scalability, flexibility, customization, and cost.