Social media optimization and social media marketing really got their start in 2006, with a blog post by Rohit Bhargava. To some extent, it existed before that post, of course; it’s worth noting that Facebook had been founded only two years before. Rohit codified rules, which others expanded on. He updated those rules several years later. As you’d expect, since we’re dealing with the online world, a lot has happened in the six years since Rohit wrote that post. And if you’re trying to understand it all, it’s downright scary. Business Insider posted an insane but painfully accurate infographic…