ISO is a disk image file format used for storing the contents of an optical disc, such as a CD or DVD. It is commonly used for distributing software and media in a format that can be easily burned to a disc or mounted on a virtual drive. ISO files are widely supported across different operating systems.
RAR is a compressed file format used for bundling multiple files and folders into a single archive. It uses a high compression ratio to reduce file size, making it ideal for large files. RAR files can be opened with special software like WinRAR or other compatible programs to extract the contents.