MediaWiki is a free and open-source wiki software platform designed for collaborative editing and content management. It was originally developed for Wikipedia and is now used by various organizations and individuals to create and maintain wikis on diverse topics. The software allows users to easily create, edit, and organize content in a user-friendly environment. One of the key features of MediaWiki is its ability to handle large amounts of information while supporting multiple users simultaneously. It includes tools for version control, user permissions, and search functionality, making it a popular choice for projects that require extensive documentation and community involvement.