Etcher is a free and open-source application designed for creating bootable USB drives and SD cards. It simplifies the process of transferring disk images, such as ISO files, onto removable storage devices. Users can easily select the image file and the target drive, making it accessible for both beginners and experienced users. The software is available for multiple operating systems, including Windows, macOS, and Linux. Its user-friendly interface guides users through the steps, ensuring that the correct drive is selected to avoid data loss. Overall, Etcher is a reliable tool for anyone needing to create bootable media.