Binary, or digital, refers to a system of representing information using only two states: typically 0 and 1. This system is the foundation of modern computing, as it allows computers to process and store data efficiently. Each binary digit, or bit, can represent a simple on/off state, which can be combined to form more complex data structures. In digital systems, groups of bits are used to represent various types of information, such as numbers, letters, and images. For example, a byte, which consists of 8 bits, can represent 256 different values. This binary representation is crucial for the operation of computers, smartphones, and other digital devices.