Web 2.0 concept, blogs, wiki, social networking

Concept of Web 2.0

Web 2.0 is the phase of the Web, popularised by Tim O'Reilly in 2004, in which the Web is a platform for participation, sharing and collaboration. Instead of static pages made by a few publishers, users create the content. Main ideas: user-generated content, collective intelligence, rich interactive applications (AJAX), social interaction, open APIs and mashups, tagging, and services that improve as more people use them. It is built on existing technologies: HTML, CSS, JavaScript, AJAX, XML/JSON and RSS.

Blogs

A blog is a website of posts shown newest first, usually by one author or a small group, with comments from readers.

• Features: posts, categories/tags, comments, archives, permalinks, RSS feed.
• Uses: personal diaries, news, technical tutorials, business updates, opinion and marketing.
• Tools: WordPress, Blogger, Medium.

Wiki

A wiki is a web application that lets many users add, edit and link pages directly in the browser, often without registration or prior approval. The word comes from the Hawaiian wiki wiki ("quick").

• Features: easy editing with simple markup, page history and version control, revert of vandalism, internal links, discussion pages.
• Examples: Wikipedia, Wikitravel, company knowledge bases (Confluence).
• Strength: shared knowledge built by volunteers; weakness: vandalism and accuracy needing moderation.

Social networking

A social network is a platform where users build profiles, connect with others and share messages, photos and videos.

• Features: profile, friends/followers, news feed, likes, comments, groups, messaging.
• Examples: Facebook, Instagram, LinkedIn, X/Twitter.
• Uses: communication, communities, marketing, recruitment.

Web 2.0 tools
  |-- Blog   : one-to-many publishing + comments
  |-- Wiki   : many-to-many editing of shared pages
  |-- Social : people connect and share

Together they make the Web a read-write medium.