Artificial intelligence (AI) is a branch of computer science that looks at how machines make decisions based on data. AI does not refer to one single entity, but to a branch of computer science that incorporates machine learning (the development of algorithms that allow computers to learn and generalise from data) and data science (processes for organising and analysing data).
Unlike human decision-making, AI makes decisions based on data i.e. information in a format that computers can process. It is this decision-making capability that is the most revolutionary feature of AI.