Web 2.0

A tag cloud (a typical Web 2.0 phenomenon in itself) presenting Web 2.0 themes
Edit box interface through which anyone could edit a Wikipedia article.
A list of ways that people can volunteer to improve Mass Effect Wiki, an example of content generated by users working collaboratively.

Web 2.0 (also known as participative (or participatory) web and social web) refers to websites that emphasize user-generated content, ease of use, participatory culture and interoperability (i.e., compatibility with other products, systems, and devices) for end users.

- Web 2.0

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End user

End user is a person who ultimately uses or is intended to ultimately use a product.

Nurses as information systems end users.
1980s-era personal computer with end-user documentation
NATO official and Afghan colonel going through end-user documentation to transfer control of barracks to the Afghan army in 2009

Libraries have had to undergo many changes in order to cope, including training existing librarians in Web 2.0 and database skills, to hiring IT and software experts...

Tim O'Reilly

Founder of O'Reilly Media (formerly O'Reilly & Associates).

O'Reilly in 2017

He popularised the terms open source and Web 2.0.


Discussion or informational website published on the World Wide Web consisting of discrete, often informal diary-style text entries (posts).

Early example of a "diary" style blog consisting of text and images transmitted wirelessly in real time from a wearable computer with head-up display, February 22, 1995
On December 6, 2002, Josh Marshall's talkingpointsmemo.com blog called attention to U.S. Senator Lott's comments regarding Senator Thurmond. Senator Lott was eventually to resign his Senate leadership position over the matter.
A screenshot from the BlogActive website.
An artist's depiction of the interconnections between blogs and blog authors in the "blogosphere" in 2007.

In the 2010s, the majority are interactive Web 2.0 websites, allowing visitors to leave online comments, and it is this interactivity that distinguishes them from other static websites.

Social networking service

Online platform which people use to build social networks or social relationships with other people who share similar personal or career content, interests, activities, backgrounds or real-life connections.

Banner in Bangkok, observed on June 30, 2014, during the 2014 Thai coup d'état, informing the Thai public that 'like' or 'share' activity on social media could land them in prison

1) social networking services are interactive Web 2.0 Internet-based applications,

Participatory culture

Opposing concept to consumer culture, is a culture in which private individuals do not act as consumers only, but also as contributors or producers (prosumers).

Memes as expression

This new culture, as it relates to the Internet, has been described as Web 2.0.

Virtual community

Social network of individuals who connect through specific social media, potentially crossing geographical and political boundaries in order to pursue mutual interests or goals.

A PLATO V terminal in 1981 displaying RankTrek application
An Internet forum powered by phpBB
An example of an IRC chat session on Xaric, a text-based client. Shown are two IRC channels and a private conversation.
A party scene from Second Life set in Hyrule
Facebook on the Ad-tech 2010

Virtual communities may synthesize Web 2.0 technologies with the community, and therefore have been described as Community 2.0, although strong community bonds have been forged online since the early 1970s on timeshare systems like PLATO and later on Usenet.

Social media

Social media are interactive digital channels that facilitate the creation and sharing of information, ideas, interests, and other forms of expression through virtual communities and networks.

Social media app icons on a smartphone
SixDegrees, launched in 1997, is often regarded as the first social media site.

1) Social media are interactive Web 2.0 Internet-based applications.

User-generated content

Any form of content, such as images, videos, text, and audio, that has been posted by users on online platforms such as social media and wikis.

An example of user-generated content in the virtual world Second Life

The BBC adopted a user-generated content platform for its websites in 2005, and TIME Magazine named "You" as the Person of the Year in 2006, referring to the rise in the production of UGC on Web 2.0 platforms.

Mashup (web application hybrid)

Web page or web application that uses content from more than one source to create a single new service displayed in a single graphical interface.

Sewage-treatment-facility - The German language has many compounds

Mashups can be considered to have an active role in the evolution of social software and Web 2.0.

World Wide Web

World's dominant software platform.

The historic World Wide Web logo, designed by Robert Cailliau.
A web page displayed in a web browser
A global map of the Web Index for countries in 2014
This NeXT Computer was used by Sir Tim Berners-Lee at CERN and became the world's first Web server.
The World Wide Web functions as an application layer protocol that is run "on top of" (figuratively) the Internet, helping to make it more functional. The advent of the Mosaic web browser helped to make the web much more usable, to include the display of images and moving images (GIFs).
Graphic representation of a minute fraction of the WWW, demonstrating hyperlinks
A screenshot of a web page on Wikimedia Commons
Dynamic web page: example of server-side scripting (PHP and MySQL)
The usap.gov website
The inside and front of a Dell PowerEdge web server, a computer designed for rack mounting
Multiple web servers may be used for a high traffic website; here, Dell servers are installed together to be used for the Wikimedia Foundation.
The results of a search for the term "lunar eclipse" in a web-based image search engine

In the meantime, developers began exploiting an IE feature called XMLHttpRequest to make Ajax applications and launched the Web 2.0 revolution.