Agile Methodology is a software development approach that emphasizes iterative progress, collaborative cross-functional teams, and adaptive responses to change over rigid planning. Originally formalized in the Agile Manifesto of 2001, it prioritizes individuals and interactions, working software, customer collaboration, and responding to change. Agile frameworks like Scrum and Kanban have transformed not only software development but also project management across various industries, promoting transparency, continuous improvement, and frequent delivery of value.