SFX files are a special type of archives since they do not require a decompression utility. Users will simply need to access an archive and it will automatically extract and decompress on its own.
Since SFX is very easy to operate, even when does not have advanced computer skills, users often prefer to pack their projects as SFX archives and distribute them woth greater ease.
SFX creators will allow users to choose the files they want to compress and to select the license text file or the icon they prefer.
Another way of creating SFX files is to convert already existing archives (such as ZIP ones) and to adjust the encryption level according to one's necessities.