social network like facebook. There are number of social networking sites where you can create your accounts, build your network, join groups and communities and after that you can promote your products/services there, share ideas/thoughts
A social network service focuses on building and reflecting of social networks or social relations among people, e.g., who share interests and/or activities. A social network service essentially consists of a representation of each user (often a profile), his/her social links, and a variety of additional services. Most social network services are web based and provide means for users to interact over the internet, such as e-mail and instant messaging. Although online community services are sometimes considered as a social network service in a broader sense, social network service usually means an individual-centered service whereas online community services are group-centered. Social networking sites allow users to share ideas, activities, events, and interests within their individual networks.
A Social Network is a website, or network of websites, specifically established to allow end users to communicate directly with each other on topics of mutual interest.
A social network is composed of a collection of actors where some actors are connected to each other by one of more relation. The emphasis on a network that reflect a social structure forms an underlying assumption.