The year 2009 marked a pivotal moment in the history of search engine optimization (SEO). It was the first time that major search engines began to focus on quality content and user experience as the primary factors for determining page rankings. As a result, SEO practitioners had to completely overhaul their strategies to adapt to the new emphasis on user-centric metrics. This article will provide an overview of the SEO landscape in 2009, exploring the changes in algorithm parameters, as well as how SEO professionals had to adjust to the new ranking system. Algorithm Changes in 2009 In 2009, major…