Social networking websites are those that allow individuals or entities, sharing a common interest, the opportunity to stay connected and meet other people with similar interest. It is a process that involves networking, interacting, building friends and relationships and obviously promoting anything online. Social networking sites can be classified as blogs, bookmarking sites, communities, etc.

A Social Network can be defined as a set of linkages among an identified group of people. It is the set of people with whom one maintains contact and has some form of social bond. And with this comes the social support, a process in which emotional, instrumental, or financial aid is obtained from one's social network. However, the concept of networking has come to play a significant role in the formal relationships, rather than just focusing on one type of tie like kinship, neighbourship, or friendship. Social Network can be really fruitful for marketing a business as well.