最新記事:SEO対策【4-SEO】 - Penguin 2.0 rolled out today http://4-seo.net/news/story/1823/ We started rolling out the next generation of the Penguin webspam algorithm this afternoon (May 22, 2013), and the rollout is now complete. About 2.3% of English-US queries are affected to the degree ... Thu, 23 May 2013 12:48:03 JST ja