A company can effectively use the social media to use to sell their brands to their customers using the social media. Social media can be more effective in communication when compare to other traditional media such as newspaper, televisions and radio. Social media is important when compared to traditional media because most of the young people of today have an inclination to use social media. Social media can also be less expensive when compared with other media for communication purpose. This paper mainly focus on the study of social media as a tool for marketing and how effectively social media will affect in developing of company brand awareness, brand building and product reach. In the modern era social media is one of the most important tools in marketing the company or website. Social media is two-way communication path one is communication and another one is feedback, this mode of communication which helps the company to market large number of targeted customers.