Interlinking

Interlinking
As incoming links became more important for search engine positioning the practice of building multiple websites and linking them together to build the overall link popularity of them all became a common practice. This tactic is more difficult to detect than others when done "correctly" (we cannot give the method for "correct" interlinking here as it's still undetectable at the time of this writing and we don't want to provide a means to spam engines). This tactic is difficult to detect from a user standpoint unless you end up with multiple sites in the top positions on the search engines in which case it is likely that you will be reported.