MediaWiki:Spamdifftool-tool/qqq

Display name of the tool called SpamDiffTool by its proper name.

It should be translated.

The message is a page title — or rather, "HTML title". That is, the text displayed on the browser's window/tab — of the Special:SpamDiffTool page. It isn't shown anywhere else. You might want to take a look at mw:Extension:SpamDiffTool for a screenshot of the extension in action and more.