Do you think advertising is the greatest way for increasing sales on Amazon?

I would like to shyrocket my sales as a newbie. Any tips?

Get a part time job, your will have money in your pocket.

Your best friend is a calculator along with the understanding of opportunity cost.

Also, it should be very obvious, how many of the amazon 3P sellers own a yacht or even make enough profit to pay one deck hands on the yacht a salary???