The government landscape is undergoing a significant transformation driven by the power of artificial intelligence (AI). From streamlining administrative tasks to informing data-driven policy decisions, AI offers many opportunities to enhance efficiency, improve constituent services, and optimize resource allocation at the state and local levels. This primer was designed to serve as a comprehensive guide for state and local government officials, employees, and policymakers seeking to understand and leverage AI's potential. We delve into the core concepts of AI technology, exploring its various applications within the government sector. Practical examples highlight how AI is already utilized to address real-world challenges municipalities and state agencies face. Whether you are a policymaker crafting legislation, a public administrator overseeing service delivery, or a technologist implementing AI solutions, this primer equips you with the knowledge and tools needed to make informed decisions and drive positive outcomes for your community. Ultimately, this primer equips state and local governments with the knowledge and tools necessary to navigate the evolving world of AI. By fostering a comprehensive understanding of this powerful technology, governments can harness its potential to build a more efficient, responsive, and citizen-centric future. The subtitle, "Everything you need to know since yesterday," is the author's way of saying that AI is changing almost every day with new applications, opportunities, and new challenges. This book was written carefully to ensure the latest was incorporated before going to press. So, it is best to view this book as foundational with the understanding it is only a guide or starting point for public managers.