A wiki is a web platform that enables multiple users to collaboratively create, edit, and arrange content through a browser. 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:** Multiple people can edit the same pages, occasionally concurrently. - **Edit history:** Each change is logged with a time and the editor’s name or IP. - **Interlinking:** Links between pages are simple to create, helping build connected content. - **Lightweight markup:** Pages are typically formatted with lightweight markup like WikiText or Markdown. - **Permission settings:** Access controls vary — from fully open editing to permissions for certain users or groups. - **Discussion pages:** Talk or discussion pages let contributors debate edits and organization. Frequent uses - Community-driven knowledge bases (for example, Wikipedia) - Internal documentation and company knowledge bases - Cooperative writing and shared notes - School and instructional projects Advantages - **Fast collaboration:** Multiple people can add and refine content quickly. - **Openness:** Edit histories and talk pages reveal how content decisions were made. - **Expandable:** Wikis expand easily as contributors add and organize content. Limitations - **Vandalism and false information:** Public editing can lead to vandalism or incorrect information. - **Inconsistent quality:** Articles can differ greatly in depth, tone, and reliability. - **Organizational issues:** Lack of structure or rules can lead to disorganization and conflicts. Example - **Wikipedia** — a well-known wiki operated by the Wikimedia Foundation and written by volunteers around the globe.