Artificial intelligence (AI) can be defined as machines that can mimic human intelligence and behavior. The document discusses different types of AI like robots, which are programmed to perform tasks, while AI can learn from human behavior. Tests for AI are also described, including the Turing Test which involves determining if a human or computer is behind different conversations. Examples of current AI technologies like drones, cars and IBM's Watson are provided. While AI is advancing, issues around job losses, costs and how AI may impact humanity are controversies that still need addressing as AI will continue growing in the future.