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:** 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:** 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. Typical uses - Community knowledge bases such as Wikipedia - Project documentation and internal company knowledge repositories - Collaborative writing and shared note-taking - Educational and classroom projects Benefits - **Fast collaboration:** Contributors can rapidly create and improve content. - **Openness:** Edit histories and talk pages reveal how content decisions were made. - **Expandable:** They scale organically as users add more pages and topics. Cons - **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. Notable example - **Wikipedia** — a well-known wiki operated by the Wikimedia Foundation and written by volunteers around the globe.