While it might be common sense for those of us looking for increased Page Rank to see Facebook's glistening "10" ranking and immediately begin salivating at the prospect of exploiting it to boost our own pages, there are several important points to note before investing a significant amount of time into Facebook for SEO purposes. Links on your business or web page's Fan page on Facebook contain the "nofollow" tag, which indicates to search engines (Google, Yahoo, etc.) that the link should not be crawled and, therefore, will not add to your page rank.