what does _X-GNOME-Keywords in .desktop files mean?

[Lucian Adrian Grijincu <lucian grijincu gmail com>]

Hi,

In http://git.gnome.org/browse/gnome-control-center/tree/panels/display/gnome-display-panel.desktop.in.in

There's this string marked for translation:

# Translators: those are keywords for the display control-center panel
_X-GNOME-Keywords=Panel;Projector;xrandr;Screen;Resolution;Refresh;

Are these strings that a user might use to search for this application?

If yes should translations include both the original english and
localizations for those terms and maybe other terms that would likely
be used in that language to get to this application?

-- 
 .
..: Lucian