PPC Consultants - Advertising is not yet a science, but products like AdWords are getting businesses closer to the point when they can be confident in the power of their digital marketing and can quickly begin generating revenue. Some contend that pay-per-click or PPC advertising is the engine that drives most e-commerce traffic online. To be fair, they have some compelling evidence. Google is one of the most powerful and valuable companies in the world, and while many people believe they are a technology or a search company, the truth is they are an advertising company. They still make 71% of their revenue with clicks, a few cents or dollars at a time.