AI, or artificial intelligence, is the simulation of human intelligence in machines that are programmed to think and act like humans. These machines are able to learn from experience, adapt to new inputs, and solve problems in a way that is similar to how humans do. AI has become an increasingly important part of many industries, including healthcare, finance, and technology, and it is being used to automate many tasks that were previously done by humans. Some examples of AI include virtual assistants, such as Siri and Alexa, as well as self-driving cars and intelligent robots.