The document outlines the origins of Agile methodology, which emerged as a response to traditional software development methods in the 1990s, culminating in the Agile Manifesto in 2001. Agile emphasizes adaptability, collaboration, and customer satisfaction, prioritizing individuals and interactions, working software, and responsiveness to change over conventional practices. It also details various Agile frameworks and methodologies, including Scrum, Extreme Programming (XP), Lean, and Kanban, each with its principles and practices aimed at fostering effective development processes.