Online community in the context of "Social networking service"

A virtual community is a social network of individuals who connect through specific social media, potentially crossing geographical and political boundaries in order to pursue mutual interests or goals. Some of the most pervasive virtual communities are online communities operating under social networking services.

Howard Rheingold discussed virtual communities in his book, The Virtual Community, published in 1993. The book's discussion ranges from Rheingold's adventures on The WELL, computer-mediated communication, social groups and information science. Technologies cited include Usenet, MUDs (Multi-User Dungeon) and their derivatives MUSHes and MOOs, Internet Relay Chat (IRC), chat rooms and electronic mailing lists. Rheingold also points out the potential benefits for personal psychological well-being, as well as for society at large, of belonging to a virtual community. At the same time, it showed that job engagement positively influences virtual communities of practice engagement.

A community of practice (CoP) is a group of people who "share a concern or a passion for something they do and learn how to do it better as they interact regularly". The concept was first proposed by cognitive anthropologist Jean Lave and educational theorist Etienne Wenger in their 1991 book Situated Learning. Wenger significantly expanded on this concept in his 1998 book Communities of Practice.A CoP can form around members' shared interests or goals. Through being part of a CoP, the members learn from each other and develop their identities.

CoP members can engage with one another in physical settings (for example, in a lunchroom at work, an office, a factory floor), but CoP members are not necessarily co-located. They can form a virtual community of practice (VCoP) where the CoP is primarily located in an online community such as a discussion board, newsgroup, or on a social networking service.

Social contagion involves behaviour, emotions, or conditions spreading spontaneously through a group or network. The phenomenon has been discussed by social scientists since the late 19th century, although much work on the subject was based on unclear or even contradictory conceptions of what social contagion is, so exact definitions vary. Some scholars include the unplanned spread of ideas through a population as social contagion, though others prefer to class that as memetics. Generally social contagion is understood to be separate from the collective behaviour which results from a direct attempt to exert social influence.

Two broad divisions of social contagion are behavioural contagion and emotional contagion. The study of social contagion has intensified in the 21st century. Much recent work involves academics from social psychology, sociology, and network science investigating online social networks. Studies in the 20th century typically focused on negative effects such as violent mob behaviour, whereas those of the 21st century, while sometimes looking at harmful effects, have often focused on relatively neutral or positive effects like the tendency for people to take action on climate change once a sufficient number of their neighbours do.

The Wikipedia community, collectively and individually known as Wikipedians, is an online community of volunteers who create and maintain Wikipedia, an online encyclopedia. Wikipedians may or may not consider themselves part of the Wikimedia movement, a global network of volunteer contributors to Wikipedia and other related projects hosted by the Wikimedia Foundation.

Flickr (/ˈflɪkər/ FLIK-ər) is an image and video hosting service, as well as an online community, founded in Canada and headquartered in the United States. It was created by Ludicorp in 2004 and was for a time a common way for amateur and professional photographers to host high-resolution photos. Flickr was owned by Yahoo! from 2005 and has been owned by SmugMug since 2018.

As of June 10, 2015, Flickr had a total of 112 million registered members and more than 3.5 million new images uploaded daily. On August 5, 2011, the site reported that it was hosting more than 6 billion images. In 2024, it was reported as having shared 10 billion photos and accepting 25 million per day. Flickr also hosts the largest collection of Creative Commons-licensed photos on the web.

The Whole Earth 'Lectronic Link, normally shortened to The WELL or The Well, is a virtual community founded in 1985. It is one of the oldest continuously operating virtual communities. By 1993 it had 7,000 members, a staff of 12, and gross annual income of $2 million. A 1997 feature in Wired magazine called it "The world's most influential online community." In 2012, when it was last publicly offered for sale, it had 2,693 members. It is best known for its Internet forums, but also provides email, shell accounts, and web pages. Discussion topics are organized into conferences that cover broad areas of interest. User anonymity is prohibited.