This document provides an introduction to Agile methodology. It discusses how Agile addresses problems in software development like lack of predictability, transparency, and responsiveness to change. It then defines what Agile is from a mindset, values, and principles perspective. It also outlines some popular Agile flavors like Scrum, Kanban, SAFe, and XP. Finally, it walks through what a day or sprint looks like for a Scrum team, including roles, artifacts, meetings, and how stories are planned and tracked on a Scrum board. The overall document serves to introduce the core concepts and promise of Agile software development.