Wikis are websites built for collaborative authoring, allowing numerous contributors to add, edit, and structure content online. Wikis prioritize ease of use and openness: pages can be added or changed without technical expertise, and most track every edit so changes can be reviewed or undone. Key features - **Collaborative editing:** Numerous contributors can work on pages, sometimes simultaneously. - **Edit history:** Each change is logged with a time and the editor’s name or IP. - **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:** Access controls vary — from fully open editing to permissions for certain users or groups. - **Discussion pages:** Dedicated discussion pages enable contributors to coordinate and discuss content. Frequent uses - Community knowledge bases such as Wikipedia - Project documentation and internal company 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:** Edit histories and talk pages reveal how content decisions were made. - **Expandable:** Wikis can grow naturally as contributors add new topics. Drawbacks - **Vandalism and false information:** Open editing may allow intentional or accidental inaccuracies. - **Inconsistent quality:** Articles can differ greatly in depth, tone, and reliability. - **Organizational issues:** Poor coordination or governance can cause content fragmentation and disputes. Example - **Wikipedia** — the best-known wiki, run by the Wikimedia Foundation and built by volunteer contributors worldwide.