There is no other low-cost promotional method out there that will easily give you large numbers of visitors, some of whom may come back to your website again and again.
If you are selling products/services or just publishing content for ad revenue, social media marketing is a potent method that will make your site profitable over time.
Those who ignore the efficacy of social media usually fall into three categories; the ones who don’t know much or anything about social media, the ones who are interested but don’t know how to use it and those who don’t believe in the value that a social media strategy can bring to any site or business.