“Penguin has changed the way we do SEO, but in my opinion, not necessarily in a negative way. Google’s goal is, and always has been, to provide searchers with the most accurate, relevant results. The new algorithm uses more “human-like” analysis of web content to judge whether or not the the links appear natural, or paid. Paid links (or what appear to be paid links) are discounted heavily. Sites that were reliant on incoming links from what Penguin determines are questionable sources have seen a drop in rankings.
There are some very easy and, quite honestly, natural, SEO ranking techniques that will avoid Penguin penalties and help your site rank.” More>>>