Spam is the most important danger to natural search engines like google and yahoo, whose objective is to offer high-quality search results for key phrases or phrases entered by their customers. Google's PageRank algorithm update ("BigDaddy") in February 2006—the ultimate phase of Google's key update ("Jagger") that commenced in mid-summer https://lorenzorclai.blogzet.com/the-free-tool-diaries-47558697