A logic gate is an electronic component that performs a basic logical function in digital circuits. It takes one or more binary inputs and produces a single binary output based on a specific rule. Common types of logic gates include AND, OR, and NOT, each defined by a truth table that outlines how the output relates to the inputs. Logic gates are fundamental building blocks of digital systems, including computers and smartphones. They are used to create complex circuits that perform calculations, store data, and control devices. By combining multiple logic gates, engineers can design intricate systems that execute various tasks efficiently.