What exactly should the search in gnome-shell do?

[Colin Law]

I am trying out the gnome desktop in Ubuntu and am confused about
exactly what the search feature in Activities is supposed to do with
regard to files searching. The feature is accessed by bringing up
Activities and typing in the search field.

It appears to find files both by name and content, but does not seem
consistent in exactly what is found. I have not managed to find a
complete description of what it is supposed to do. Does anyone here
know?

Colin