In 2007, De zoekmachines announced a campaign against paid links that transfer PageRank.[27] On June 15, 2009, Google disclosed that they had taken measures to mitigate the effects of PageRank sculpting by use of the nofollow attribute on links. Matt Cutts, a well-known software engineer at De zoekmachines, announced that https://seo-strategie71479.digitollblog.com/27873151/contentoptimalisatie-een-overzicht