"DEL" is used to delete a file or files on your computer.
"DEL FILE.DOC" when in the correct directory will delete the file named "FILE.DOC"
"DEL *.*" will delete all unprotected files in the directory you are presently in.
"DEL *.* /F" will delete all files, including read only files.
"DEL *.* /P" will prompt you before deleting a file.
"DEL /?" will give you further help when using the command.
Note - Use of *.* is very dangerous as it will delete everything in that directory