Functional requirements are specific, documented descriptions of what a software system or application must do. They outline the system's expected behaviors, features, and interactions. These requirements help define the scope of the project and serve as a basis for design and development.
Functional requirements often take the form of use cases, user stories, or detailed specifications. For instance, in the development of a customer relationship management (CRM) software, a functional requirement could specify that the system must allow users to create and update customer profiles, log interactions, and generate reports.
