During development process or for checking a live install, and if you don't want to ftp to your site, you can use this block to submit a portion of code directly into your pages. With this you can obtain, by example, a phpinfo() more quicly than ever, or check variables values, or even use advanced commands.
There is no security checking, so be careful, you can do whatever you want but it's the aim.
This block supports l10n and is packaged with en/fr.