Social media are computer-mediated tools that allow people or companies to create, share, or exchange information, career interests, ideas, and pictures/videos in virtual communities and networks.
The variety of stand-alone and built-in social media services currently
available introduces challenges of definition.
There are advantages and disadvantages of social media
Social media facilitate the development of online social networks by
connecting a user's profile with those of other individuals and/or
groups. Social media depend on mobile and web based technologies
to create highly interactive platforms through which individuals and
communities share, co-create, discuss, and modify user-generated
content. They introduce substantial and pervasive changes to
communication between businesses, organizations, communities, and
individuals. These changes are the focus of the emerging field of techno-self studies. Social media differ from traditional or industrial media in many ways, including quality, reach,
frequency, usability, immediacy, and permanence. Social media operate
in a dialogic transmission system (many sources to many receivers). This is in contrast to traditional media that operates under a monologic transmission model (one source to many receivers).
There are many effects that stem from Internet usage. According to
Nielsen, Internet users continue to spend more time with social media
sites than any other type of site. At the same time, the total time
spent on social media in the U.S. across PC and mobile devices increased
by 99 percent to 121 billion minutes in July 2012 compared to 66
billion minutes in July 2011
For content contributors, the benefits of participating in social media
have gone beyond simply social sharing to building reputation and
bringing in career opportunities and monetary income, as discussed in
Tang, Gu, and Whinston (2012)
Source: wikipedia
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