A wiki is a website designed for collaborative editing, letting many people create, update, and organize content directly in a web browser. They emphasize simplicity and openness — pages can be created or modified without special technical skills, and most maintain an edit history so revisions can be reviewed or reverted. Main features - **Collaborative editing:** Numerous contributors can work on pages, sometimes simultaneously. - **Edit history:** Every modification is recorded with a timestamp and the editor’s identity or IP address. - **Interlinking:** Creating links among pages is straightforward, which helps interconnect content. - **Lightweight markup:** Simple markup languages (such as WikiText or Markdown) are used to format pages. - **Permission settings:** Some wikis are open to anyone; others limit edits to registered users or specific groups. - **Discussion pages:** Talk or discussion pages let contributors debate edits and organization. Typical uses - Community knowledge bases such as Wikipedia - Project docs and corporate knowledge repositories - Group writing and collaborative note-taking - School and instructional projects Benefits - **Fast collaboration:** Many people can collaborate and iterate quickly on content. - **Openness:** Visibility into edits and discussions shows how decisions were reached. - **Expandable:** Wikis can grow naturally as contributors add new topics. Drawbacks - **Vandalism and false information:** Open contribution can result in deliberate or accidental misinformation. - **Inconsistent quality:** Content quality may vary widely between pages. - **Organizational issues:** Lack of structure or rules can lead to disorganization and conflicts. Notable example - **Wikipedia** — the largest example, maintained by the Wikimedia Foundation and contributed to by volunteers worldwide.