Like Bigfoot, SEO myths are always out there, here are a few you need to know about.
Is there a magical keyword density that can make your pages soar to top rankings? No there is not. Yes, you can over-optimize or keyword stuff (which makes Matt Cutts frown), but you can’t get that number just right.
Keyword density mattered a long time ago, but it just doesn’t mean much today. What does matter is creating coherent, high quality content that gets shared on social networks and actually provides value for readers.
You know who agrees with this thought? SEOMoz, and if that’s not enough to convince you, I don’t know what would.