Docusaurus is a modern static website generator optimized for creating documentation websites quickly and easily. Developed by Facebook, it's designed to be easy for Markdown authors to use and extend. Docusaurus allows teams to publish documentation websites with features like versioning, document search, and translations out of the box. It uses React for its website shell, enabling the creation of interactive documentation experiences. Docusaurus also supports plugins for enhanced functionality and customization. With its focus on performance and ease of deployment, Docusaurus is an excellent choice for open-source projects, product documentation, and developer portals.