It means useful information. Information that produces expected results.
If you do any computer programming you learn the difference between the
outcome of deliberate design and encoded information, and garbage.
Garbage In - Garbage out.
A trash can can be filled with information. But if it is not in a form
that is usable, it remains garbage. Somebody can create a system
to harvest the information and if a process is put into place, the garbage
information can be used to...say...steal your identity.
But
IF
the information is in a usable form,
AND
processed correctly
THEN
it might produce results.
ELSE
the effort will fail.