A kilobyte (KB) is a unit of digital information storage that equals 1,024 bytes. It is commonly used to measure the size of small files, such as text documents or images. The term "byte" refers to a group of eight bits, which are the basic units of data in computing. Kilobytes are part of a larger hierarchy of data measurement, which includes megabytes (MB) and gigabytes (GB). Each of these units represents a larger quantity of data, with 1,024 kilobytes making up one megabyte. Understanding kilobytes is essential for managing file sizes and storage capacity in devices like computers and smartphones.