The major advantage of exponential notation is that it simplifies a number into a more readable form, so we don't have to count all the zeros every time we look at it / calculate it. It helps us to identify big numbers as small decimals which we are more familiar with.
Exponential is handy when it comes to writing large numbers. instead of writing out 1,000,000,000, you can simply write ten to the ninth power, or 10^9
