At the risk of sounding sensational, if you understand the concepts introduced in this article it could literally mean the difference between miserable failure and insane online profits for your business. I'm not talking about a magical formula that will guarantee success, but it's something that all online marketers need to understand...
If you spend $50 on advertising and it generates more than $50 in net profits, that's a good investment.
Simple right? Well, through the use of proper testing and a "scientific" approach to advertising, there's no reason you can't turn your original $50 ad into millions of dollars in profits. It's just a matter of developing a system that creates a profit, and then reinvesting your initial profits back into your business in order to further expand your advertising.