Kelly Rigotti discusses social networking and how it has evolved networking from face-to-face interactions to online communities. Social networking allows people to build online communities similar to offline communities like family, friends, and work. Facebook is useful for finding long lost friends and staying aware of basic information but has changing privacy policies and potential unwanted contacts. LinkedIn brings professional networks online and allows transferring between personal and professional networks but has spam issues. Twitter is useful for accessing contacts, finding resources, and establishing an online reputation but can be overwhelming with large lists and spam.