Gigabyte is used for an information storage limit that is generally identical to 1 billion bytes. The gigabyte is a multiple of the unit byte for digital data. One gigabyte is one billion bytes. The GB is the unit symbol for the gigabyte. The term is likewise utilized in certain fields of software engineering and information technology. Gigabytes are regularly utilized for estimating storage capacity, information transmission speed or random-access memory (RAM), with some important differences.