Binary, or digital, refers to a system of representing information using only two states: typically 0 and 1. This system is the foundation of all modern computing and digital communication. Each digit in binary is called a bit, and combinations of bits can represent numbers, letters, and other data types. In binary code, each position represents a power of 2, allowing for efficient data processing and storage. For example, the binary number 1011 represents the decimal number 11. This simplicity and efficiency make binary essential for devices like computers, smartphones, and digital cameras.