Wikis are websites built for collaborative authoring, allowing numerous contributors to add, edit, and structure content online. Simplicity and openness are central to wikis: anyone can often add or change pages without technical knowledge, and edits are usually logged for review or rollback. Common 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. Common uses - Community knowledge bases such as Wikipedia - Internal documentation and company knowledge bases - Collaborative writing and shared note-taking - Classroom and educational projects Advantages - **Fast collaboration:** Multiple people can add and refine content quickly. - **Openness:** Transparency through revision histories and discussions. - **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:** Articles can differ greatly in depth, tone, and reliability. - **Organizational issues:** Without clear governance, content may become fragmented or disputed. Illustration - **Wikipedia** — a well-known wiki operated by the Wikimedia Foundation and written by volunteers around the globe.