How to display product id in woocommerce card?

Question

WooCommerce

How to display the product id in its card?
I found a solution, but I don't know where to put it.
I watched a video on changing the product card, read several articles. Apparently I'm too stupid ...
Here is an example of a solution that I found. But where do you put it? Maybe there are other ways?

add_action( 'woocommerce_before_single_product_summary', 'cusom_woo_info_1', 10 );
function cusom_woo_info_1() {
    global $post;
    echo 'Product ID: ' . $post->ID;
}

Answer 1

To your theme's functions.php file