This document provides a comprehensive overview of the European Union's Artificial Intelligence Act (EU AI Act), a landmark legislation designed to regulate AI systems within the EU market. We will explore its primary goals, which include ensuring AI systems are safe, transparent, non-discriminatory, and environmentally friendly, while also fostering innovation. This guide will detail the Act's risk-based approach, categorization of AI systems, compliance requirements, penalties, and enforcement timeline, offering a clear understanding of this pivotal regulation.