What Does Gigabit (Gb) Mean?

Gigabit (Gb) is a data measurement unit applied to digital data transfer rates (DTR) and download speeds. One Gb equals one billion (1,000,000,000 or 109) bits.

Techopedia Explains Gigabit (Gb)

Central processing units (CPU) are built with data control instructions for bits–the smallest data measurement unit. Bits are magnetized and polarized binary digits that represent stored digital data in random access memory (RAM) or read-only memory (ROM). A bit is measured in seconds and characterized by high-voltage 0 (on) or 1 (off) values.