If you are using a Custom Post type to manage content, but the CPT doesn't utilize a 'single' page, you'll need to make sure the single pages aren't indexed by Google. Use this function to set noindex and nofollow on those pages
// Prevent CPT Singles from being indexed
function rs_dont_follow_me() {
if( is_singular('my-first-post-type') || is_singular('my-second-post-type') ) {
echo '<meta name="robots" content="noindex, nofollow">';
}
};
add_action( 'wp_head', 'rs_dont_follow_me', 10, 1);