Million of index may not have any traffic, this is true!!!.
Someone misunderstood that why I have no any traffic as I have a lot of index from google. Let think this is true?. Ok, you will have lots index but not good ranking, your index can be found NOT at the first or second page that hard for people to reach your.
And also, you may have high ranking with very niche keyword. What's niche for?, it means very special word that people may not search. No any competitor mean niche. You are only one to setup unique keyword and no any people to seek or not use for market, it's sure that your rank is NUMBER 1 but NO TRAFFIC since no one type this niche, just only you using it
SEO is not hard to do. Google like unique content, if you can do so, your website will show high ranking automatically, believe me or not?