This command edits your clipboard. "Clipboard" is the term for what you have "copied" and ready to "paste" in relation to a computer. For example of you highlight this text, right click and copy it, the text is said to be in your clipboard.
/clipboard [-an] <text>
- -a will append the text to the end of what is already on the clipboard, if not specified the clipboard text will be overridden with the given text.
- -n will add $crlf (carriage return/line feed characters) to the end of the added text.