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. In the context of computer memory, kilobytes are often used to describe the capacity of older storage devices or the size of simple applications. For larger files, such as videos or high-resolution images, larger units like megabytes (MB) or gigabytes (GB) are typically used.