Keyword Difficulty (also known as “SEO difficulty” or “keyword competition”) is the process of evaluating how difficult it is to rank in Google's organic search results for a specific term.

We can say that, when we will go for Keywords research then we should check Keywords volume as well as competitors on it, through this process we can find Keywords difficulties if our Volume is High and competitors is low then Our keywords difficulties is low, If our keywords and competitors both are High then Our keywords density will High.