Cora SEO Software uses correlation to reverse engineer possible content ranking factors and gives prioritized recommendations on how to tune your content. I know. I know. "correlation isn't causation"... But unless you are an engineer at Google working on search algorithms then correlation is the best data you can directly measure from the search results. I named the software Cora because it is "cora-lation" SEO software. Strong correlation is what makes my investments in SEO tuning better than everyone else's. If a factor doesn't at least correlate with rankings then you are wasting time and money on it. When you start plotting data on what is working in your keyword space you will be amazed at how much of mainstream SEO advice is just plain wrong and potentially harmful.