Originally Posted by mike345
Penguin introduced to avoid over-optimization , black hat stuffs....
Penguin is not about offpage but make sure that your backlinks should not be on spam website or low authority site.
Google quickly dropped the "over-optimization" tag for Penguin and instead said that it was to combat "webspam". They specifically mentioned spun articles containing links and sites with "unusual linking patterns" in the Official Google Webmaster Central blog published 24 April which explained what Penguin was about, so I don't see how you can say "Penguin is not about offpage". I would be interested to see the source of your information.