In my opinion, the small and medium-sized enterprises should do SEO for making money, not for ranking. So, there are some principles for you. Firstly, you should know that SEO is just a method for your websiteís promotion. Next, the websiteís promotion is only a part for network marketing. Of course, network marketing is a part of networkís operation. And the ultimate goal of network operation is websiteís profit, not for the form.
SEO is just a kind of technology. Keeping pace with the times and innovate are the most important for you enterprise.