Data Representation:

Computers work with binary data, which consists of only two states: 0 and 1. These are often represented as electrical signals being either “on” or “off.”
Everything you see and interact with on a computer – text, images, videos, programs – is ultimately represented as sequences of these 0s and 1s.
Bits and Bytes: A single 0 or 1 is a bit. Eight bits together form a byte, which is a common unit for representing characters (like letters and numbers).
Larger units include kilobytes (KB), megabytes (MB), gigabytes (GB), and terabytes (TB).