PageRank
The PageRank of a node is “a numerical quantity that is repeatedly refined using an update rule,” according to Networks, Crowds, and Markets. The page rank confers a certain amount of authority to a page based on the number of pages it links to and the number of pages that link to it. This ranking determines, among other things, how highly a page will be ranked in a search engine and therefore how many hits the page is likely to get.
One article on Forbes details strategies for increasing page rank. These strategies can be used by individuals or those representing companies to further their businesses, as technology and the web continues to impact the corporate world more and more. The most effective strategies include internal linking and listing your site on local, niche, or professional directories.
http://www.forbes.com/sites/jaysondemers/2013/05/23/the-3-pillars-of-seo-in-2013-content-links-and-social-media/2/