14 Apr 18 8:28 am
Keyword difficulty assumes a site ranks only based on links. This is not true nowadays especially, and KD metrics are becoming increasingly outdated. You cannot rely on this anymore. Google uses user behavior and matches user intent to content. So if there is a topic that has all websites with a lot of links ranking (high KD score) but for some reason is not fulfilling user intent, a low authority site can rank. So it relies on a manual inspection. However keyword difficulty is great for bulk analysis, then you can refine further with manual competitive analysis.