As an Internet marketer, you do need to know what this type of marketing is as it will likely be one of the most important, profitable tools you have in low cost online marketing that is highly effective.
First, understand what it is and then learn how to implement it within your own business. Most business owners can find success using this method to help them to develop their online business.
It works in any sector, industry or niche. When applied effectively, it is a low cost, long term success tool no marketer should go without.