Believe it or not, Google does change more than 500 times every year, because of its constant strive to perfection. Digging in the past algorithmic updates by Google allows you to get an overview of the search engine's main priorities and develop a SEO strategy accordingly. Here are the most important Google algorithm updates and product releases, which all changed the way we do SEO and search. For full size of the image visit http://www.seopalbg.com/blog/google-algorithm-changes-1998-2012-infographic/