Stop Google Indexing WordPress Image Attachment Pages

You can use this before </head>

<?php if($paged > 1 || is_attachment()){ echo '<meta name="robots" content="noindex,follow" />'; } ?>

Moved to Fixing WordPress, this is not a Developing with WordPress topic.

Hello Xaibi,

How do I insert this code into WordPress?

Thanks

Thank you Jan

He is suggesting that you modify your theme (or create a child theme for it).
I think there are a lot of SEO plugins that do this for you.