Google algorithms vs Google penalties, explained by an ex-Googler
This former Google quality analyst explains the difference between Google’s algorithms, manual actions, quality and penalties. Please visit Search Engine Land for the full article. Source: http://feeds.searchengineland.com/~r/searchengineland/~3/co_lftrnO0I/google-algorithms-vs-google-penalties-explained-by-an-ex-googler-345011