Now a days Social Media is very popular and hence getting traffic from Social Media is very easy. Just share your article on social media in your friend circle and if it is useful people will like, share and comment it. But it's not that simple as it sound.
You have to build your reputition on social media to get better output. So, if you are popular on website, chances are that your website will too get good users interaction and hence it is a positive signal to the Google search engine which can result in better ranking of your website.