can't find list

hi

where should i paste this code to see list?
[ Moderator note: Please use the code button when posting code. ]

<!------ CODE ------->

$favorites = get_user_favorites();
if ( $favorites ) : // This is important: if an empty array is passed into the WP_Query parameters, all posts will be returned
$paged = ( get_query_var('paged') ) ? get_query_var('paged') : 1; // If you want to include pagination
$favorites_query = new WP_Query(array(
'post_type' => 'post', // If you have multiple post types, pass an array
'posts_per_page' => -1,
'ignore_sticky_posts' => true,
'post__in' => $favorites,
'paged' => $paged // If you want to include pagination, and have a specific posts_per_page set
));
if ( $favorites_query->have_posts() ) : while ( $favorites_query->have_posts() ) : $favorites_query->the_post();
echo get_the_title();
endwhile;
next_posts_link( 'Older Favorites', $favorites_query->max_num_pages );
previous_posts_link( 'Newer Favorites' );
endif; wp_reset_postdata();
else :
echo "Please select an item for favorite post list";
endif;

https://www.ads-software.com/plugins/favorites/