Search Engine Optimization (SEO) has been around for nearly two decades, but 2013 marks a year of significant change in the industry. Many of the tactics and strategies that were popular just a few years ago have become outdated and ineffective, while new approaches – such as content marketing, social media optimization, and mobile optimization – have become increasingly important. As such, SEO in 2013 is all about leveraging these new strategies to gain an edge over the competition. Content Marketing Content marketing is one of the hottest topics in the SEO world right now. Content marketing can be defined…