AI, or Artificial Intelligence, refers to the simulation of human intelligence in machines that are programmed to think and learn like humans. It encompasses various technologies and approaches, including machine learning, deep learning, natural language processing, computer vision, and more. AI systems can analyze data, recognize patterns, make decisions, and solve problems, often with a level of accuracy and speed that surpasses human capabilities in certain tasks. AI is widely used across industries for automating processes, improving efficiency, and enabling new functionalities in products and services.