TrustRank is a link analysis technique described in a paper by Stanford University and Yahoo.  It is the state of the art that  separating useful webpages from spam and unwanted mails.   Many Web spam pages are created, with an aim to confuse search engines.  In one hand these pages are built by commerical use, and the said pages usually get a high ranking which is higher than deserved.   It is costly if the pages are evaluated by human, thus some methodologies like Google Pagerank is promoted to review the importance of web documents.

TrustRank is a link analysis technique for semi – automatically separating useful webpages from spam webpages.   They claim that ” deliver the correct rank your website has. ”   So how it works?   Once the reputable seed pages are manually identified, a crawl extending outward from the seed set seeks out similarly reliable and trustworthy pages.  TrustRank’s reliability diminishes as documents become further removed from the seed set.

Written by Eugene Wong on June 22, 2009.
Last revised by: Eugene Wong on April 2, 2011.