WinRAR is a popular file compression and archiving software used for creating, managing, and extracting compressed files. It supports a wide range of formats, including RAR and ZIP, and offers powerful compression algorithms to reduce file sizes efficiently. WinRAR includes features like password protection, error recovery, and split archives for easier file sharing. It integrates seamlessly with Windows Explorer for convenient file management. Known for its speed and reliability, WinRAR is widely used for organizing and transferring files securely.