The chances are that you may have found this article via Twitter, Facebook, or another social media channel such as a social bookmark or a web 2.0 site such as Tumblr or WordPress. What you have just accomplished is that the strategy of promoting via social media is a effective method for bringing readers to a blog and a decent amount of traffic to a blog – how much work you put into the promotion via social media sites and how you inspire sharing is another thing which leads to the ROI.