Social media marketing is a great channel for promoting a products and services to reach all size of prospective customers. The social media is most effective free channels for marketing your business now a days. The social media is a platform for to share the information for large number of peoples at a time. The social media purely based on internet and internet related applications. The preset study focusses on the role of social media to promote marketing. And also, to study the introduction of social media tools and the various type of technologies used in social media to promote digital marketing. This paper discusses about the social media and social media marketing tools.