Functional Requirement is a specification that describes a system's set of interactions, features, or functionality. Coursera's Functional Requirement catalogue teaches you to accurately identify, analyze, and document functional requirements for any system or business process. You'll learn about various tools and techniques for gathering functional requirements, such as user story mapping, use cases, and data flow diagrams. Also, you'll be able to validate and verify requirements, manage changes in requirements, and transform them into a detailed system design. This skill is essential for roles such as business analysts, systems analysts, project managers, and IT consultants.