How to display custom field in product description?

You can take the help of hooks WooCommerce provides. Here is the link to the visual hook guide https://www.businessbloomer.com/woocommerce-visual-hook-guide-single-product-page/ Here is the code that suits your need. add_action( ‘woocommerce_after_single_product_summary’, function() { global $product; if ( $product->is_type( ‘simple’ ) ) { get_post_meta( get_the_ID(), ‘_additional_description’ ); } } ); I hope it helps.