AI stands for Artificial Intelligence, which refers to the simulation of human intelligence in machines. It involves the development of algorithms and computer programs that can perform tasks such as learning, problem-solving, decision-making, and language processing. AI is used in a wide range of applications, including self-driving cars, virtual assistants, image and speech recognition, and predictive analytics. AI is a rapidly evolving field with the potential to revolutionize many aspects of our lives, but also poses ethical and social challenges that need to be addressed.