Great article! SEM Rush's new ranking study of 600,000 search queries showed a positive correlation between direct traffic and top rankings. They indicated that Google prioritizes domains with authority and consequently more direct traffic when ranking websites in its search results. See their study here: https://www.semrush.com/ranking-factors/. So, direct traffic can be viewed as a positive ranking correlation.
Incidentally, according to a June 2013 study by Chitika, 9 out of 10 searchers don't go beyond Google's first page of organic search results, a claim often cited by the search engine optimization (SEO) industry to justify optimizing websites for organic search. Organic SEO describes the use of certain strategies or tools to elevate a website's content in the "free" search results.
If the blog post you’ve selected has less than 2,000 words, one simple way to increase organic traffic is to increase the word count — but don’t just fluff it up. Make sure any content you add also adds value. Instead of watering down paragraphs, add completely new sections that cover points you haven’t introduced yet. Chances are, the added word count will allow you add additional keywords. Speaking of…
The term “organic traffic” is used for referring to the visitors that land on your website as a result of unpaid (“organic”) search results. Organic traffic is the opposite of paid traffic, which defines the visits generated by paid ads. Visitors who are considered organic find your website after using a search engine like Google or Bing, so they are not “referred” by any other website.