Agile refers to a set of project management methodologies that emphasize flexibility, collaboration, and customer feedback. It promotes iterative development with a focus on delivering small, functional pieces of software frequently. Agile methodologies, such as Scrum and Kanban, encourage teams to adapt to changes rapidly rather than sticking to a fixed plan. This approach allows developers to respond to evolving requirements and ensures that the final product aligns closely with user needs, ultimately enhancing workflow efficiency and satisfaction.