Does Social Media Marketing Really Help To Improve The Search Engine Rankings

Social Media sites like Digg, Reddit, Stumbleupon, and Delicious are highly authoritative sites which can dramatically improve search engine rankings if used properly. Any SEO specialist knows link building is essential to improving search engine visibility, but some clients have trouble accepting social media as a link building tactic.
Social media is only place where one can make people to drop in sometime on the information provided. It is the easiest method to get the enormous traffic to the site. One of my article on few social networks has got 200 to 300 traffics per day.
But one must make sure that you just doesn't spam the Social media sites to get the traffic and backlinks. Give the visitor exactly what you want to give them.