Here’s a simple PHP snippet to remove the annoying “Order Notes” / “Additional Information” on the checkout page. This section can usually be found below the shipping form (or the billing form if you have no shipping). Thankfully, you just need 1 line of custom PHP!
PHP Snippet: Remove the Order Notes Field and “Order Notes” title from the Checkout Page – WooCommerce
/** * @snippet Remove Order Notes @ WooCommerce Checkout * @how-to Get CustomizeWoo.com FREE * @author Rodolfo Melogli * @compatible WC 3.7 * @donate $9 https://businessbloomer.com/bloomer-armada/ */ add_filter( 'woocommerce_enable_order_notes_field', '__return_false' );