Information on a digital computer is stored in bits, where each bit is a 0 or a 1, which are stored as different levels of electrical charges. Bits can be combined to represent binary numerical values, which in turn can be combined to represent pictures, sound files, word-processing documents, and can also be used in transmitting information across the internet.
A byte is a unit of data that is 8 bits long. A byte is the standard “chunk size” for binary information in most modern computers
Larger Chunks of Data:
On modern computers the amount of information we can create and store has grown so large that we need new units of measurement to describe the size of our data.
The following web sites can give you more information:
Stanford University - CS 101 - Kilobytes Megabytes Gigabytes:
https://web.stanford.edu/class/cs101/bits-gigabytes.html
Computer Hope - How much is 1 byte, kilobyte, megabyte, gigabyte, etc.?
It is likely you were also given a quiz to go along with this page. See the referring page.