SEO software provider Link-Assistant.Com has just published a free guide that explains Google's recent Penguin 3.0 update and describes the measures one could take to protect their site from being demoted on Google.

Link-Assistant.Com, a company that makes industry-leading SEO tools, has published a whitepaper with all the important facts and stats on Google's Penguin 3.0 update.

Penguin 3.0 was launched on October the 17th and affected roughly 1% of Google searches worldwide. It is a change to Google's "ranking algorithm", that is, the algorithm used to rank websites in search results for particular queries.