Do you know what’s the most important thing to learn in web marketing? Almost everybody would say it’s web traffic, because you need folk in order to make money. But you can make nothing even if you get 1000s of visitors every day if you don’t understand how to sell stuff to them. CPA Tsunami implies that selling is the most important ability to learn. If you understand how to sell, you can make a good income even from a hundred visitors per day. Having the ability to squeeze each penny from the few people that visits your site is what makes the difference, not the selection of traffic.