Meaning – The term petabit, or Pb, refers to a unit of measurement of computer storage, which equates to one quadrillion bits of data (10^15).
A bitis one single binary data unit – either a one or zero. A byte is a sequence of bits. While conventional consumer technology measurements use bytes as the fundamental unit, some feel that bits provide a more reasonable basis for data measurement, because one bit corresponds to one binary unit.
The petabit is closely related to the pebibit, a unit multiple derived from the binary prefix pebi of the same order of magnitude, which is equal to 2^50 bits = 1125899906842624bits, or approximately 13% larger than the petabit.
Example of usage – “Another way to represent this is that one petabit equals one million gigabits (Gb). The petabit is one of the largest types of practical measurements for data storage or data transfer rates (DTR).”