DE GROOTSTE GIDS NAAR CONCURRENTIEANALYSE

In 2007, De zoekmachines announced a campaign against paid links that transfer PageRank.[27] On June 15, 2009, De zoekmachines disclosed that they had taken measures to mitigate the effects ofwel PageRank sculpting by use ofwel the nofollow attribute on links. Matt Cutts, a well-known software engineer at Google, announced that Google Bot would no