Social media is the social interaction among people in which they create, share or exchange
information and ideas in virtual communities and networks.
[1]
 Andreas Kaplan and Michael Haenlein 
define social media as "a group of Internet-based applications that build on the ideological and 
technological foundations of Web 2.0, and that allow the creation and exchange of user-generated 
content."
[2]
 Furthermore, 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 organizations, communities, and individuals.
[3]   
Diagram depicting the many different types of social media 
Social media differ from traditional or industrial media in many ways, including quality,
[4]
 reach, 
frequency, usability, immediacy, and permanence.
[5]
 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 37 percent to 121 billion minutes in July 2012 compared to 88 
billion minutes in July 2011.
[6]
 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).
[7] 
Geocities, created in 1994, was one of the first social media sites. The concept was for users to 
create their own websites, characterized by one of six "cities" that were known for certain 
characteristics.
[8] 
Classification of social media[edit]   
Social media technologies take on many different forms including magazines, Internet 
forums,weblogs, social blogs, microblogging, wikis, social networks, podcasts, photographs or 
pictures, video, rating and social bookmarking. Technologies include blogging, picture-
sharing, vlogs, wall-posting, music-sharing, crowdsourcing and voice over IP, to name a few. Social 
network aggregation can integrate many of the platforms in use. 
By applying a set of theories in the field of media research (social presence, media richness) and 
social processes (self-presentation, self-disclosure), Kaplan and Haenlein created a classification 
scheme in their Business Horizons (2010) article,
[9]
 with six different types of social media: 
1.  collaborative projects (for example, Wikipedia) 
2.  blogs and microblogs (for example, Twitter and Tumblr) 
3.  content communities (for example, YouTube and DailyMotion) 
4.  social networking sites (for example, Facebook) 
5.  virtual game-worlds (e.g., World of Warcraft) 
6.  virtual social worlds (e.g. Second Life) 
However, the boundaries between the different types have become increasingly blurred. For 
example, Shi, Rui and Whinston (2013) argue that Twitter, as a combination of broadcasting service 
and social network, classes as a "social broadcasting technology".
[10]