"Social network analysis [SNA] is the mapping and measuring of relationships and flows between people, groups, organizations, computers, URLs, and other connected information/knowledge entities. The nodes in the network are the people and groups while the links show relationships or flows between the nodes. SNA provides both a visual and a mathematical analysis of human relationships. Management consultants use this methodology with their business clients and call it Organizational Network Analysis [ONA]."
Process and tool for mapping the interactions in a Facebook group. Helpful to SEE the exchange of ideas and knowledge. TAGSExplorer does this for Twitter (http://hawksey.info/tagsexplorer/).