Google Penguin looks mostly at your link source, says Google

by Barry Schwartz
Another nugget of information learned from the A conversation with Google’s Gary Illyes (part 1) podcast at Marketing Land, our sister site was that Penguin is coined a “web spam” algorithm but it indeed focuses mostly on “link spam.” Google has continually told webmasters that this is a web spam algorithm, but every webmaster and SEO focuses mostly around links.Read the full article