Binary is not easy to read for humans! 011001000110111100100000011110010110111101110101001000000110000101100111011100100110010101100101

That's why we use hex. Its' a shorthand for binary.

Each 4 digits of binary is one of 16 unqiue combinations as seen below. Since each digit must be unique, after running out of numeric digits we us the letters A, B, C...