You might be interested in what Perl::Critic::Policy::InputOutput::ProhibitExplicitStdin and the corresponding part of PBP has to say about it. Also, you might want to consider checking via IO::Interactive to see if the terminal is actually interactive.

use warnings;
use strict;
use IO::Interactive 'is_interactive';
use Term::ReadLine;

print "Hello, World!\n";

if ( is_interactive() ) {
    print "Press Enter to continue...\n";
    Term::ReadLine->new("")->readline("");
}
else { warn "Noninteractive, continuing...\n" }
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This will prompt the user to press enter if connected to a terminal, but if the script is used in a non-interactive environment (simple example: perl script.pl | cat), it won't. See also other prompting alternatives.