2007 was the year that SEO developed most rapidly after its introduction to the domestic market. However, during this year, the irregular development of SEO also grew at an astonishing speed, which directly led to enterprises beginning to have misconceptions about SEO, and caused some sensitive measures by search engines. Overall, SEO was still successful in 2007, giving rise to a large number of successful SEOers and enterprises that succeeded because of SEO. Today, Little Hu will review with everyone the top ten most popular SEO tools from abroad in 2007.