A kilobyte (KB) is a unit of digital information storage that is commonly used to measure the size of files. One kilobyte is equal to 1,024 bytes, where a byte is the basic unit of data in computing. Kilobytes are often used to describe small files, such as text documents or simple images. In the context of computer memory, kilobytes are part of a larger hierarchy of data measurement. For example, 1,024 kilobytes make up a megabyte (MB), which is used for larger files like photos and videos. Understanding kilobytes helps users manage their digital storage effectively.