use strict;
package foo;
our $quux = "Howdy, world!\n";
# dump symbol table
print "foo: $_ => $foo::{$_}\n" for keys %foo::;

package bar;
# dump symbol table
print "bar: $_ => $bar::{$_}\n" for keys %bar::;
print $quux;
__END__
foo: quux => *foo::quux
Howdy, world!
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There you have the "does not necessarily create a variable" part - no variable is created in package bar. The variable $quux is shared between both packages - they would say "it's our $quux" if they could speak. Same applies for variables declared with our in different files. Having a file as

# file include.pl
use strict;
our $me;
sub japh {
    print $me,"\n";
}
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to be included in a main script

#!/usr/bin/perl
use strict;
our $me = "Just another perl hacker";
require "include.pl";
japh();
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running the main script will output

Just another perl hacker
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The $me variable is shared between the two files. That's what our means ;-)

--shmem

update: corrected "file scoped" to "lexical scoped". See Re^4: Mine or Ours.

_($_=" "x(1<<5)."?\n".q·/)Oo.  G°\        /
                              /\_¯/(q    /
----------------------------  \__(m.====·.(_("always off the crowd"))."·
");sub _{s./.($e="'Itrs `mnsgdq Gdbj O`qkdq")=~y/"-y/#-z/;$e.e && print}