WooCommerce frontend messages and error notifications display on the Single Product page, Cart page, Checkout page, My Account page and may show on page load or upon a specific user action.
The potential problem is that – same as the WordPress backend – WooCommerce messages can use a lot of vertical space, hence can push useful content further down the page, and possibly disturb the navigation – especially on the Checkout page.
A cool workaround may be to place a dismiss “x” button on the WooCommerce notices, so that customers can quickly close them and gain back some space.
We will use a mix of PHP, JS and CSS in the snippet below in order to achieve our final goal. Enjoy!

PHP + JS Snippet: Add a Dismiss Button @ WooCommerce Checkout Message & Error Notifications
/**
* @snippet Close Button @ WooCommerce Checkout Notifications
* @how-to Get CustomizeWoo.com FREE
* @author Rodolfo Melogli
* @compatible WooCommerce 7
* @donate $9 https://businessbloomer.com/bloomer-armada/
*/
add_action( 'wp_loaded', 'bbloomer_dismiss_woocommerce_message' );
function bbloomer_dismiss_woocommerce_message() {
if ( is_admin() ) return;
wc_enqueue_js( "
$(document).on('updated_checkout checkout_error',function(){
$('.woocommerce-message,.woocommerce-info,.woocommerce-NoticeGroup-checkout').each(function(){
if (!$(this).find('.dizmiz').length) $(this).append('<span class=\'dizmiz\' title=\'Dismiss\'>x</span>').css('position','relative');
});
});
$(document).on('click','.dizmiz',function(){
$(this).parent().hide(600);
});
" );
}
CSS Snippet: Style the Dismiss Button
.dizmiz {
right: 1em;
top: 1em;
position: absolute;
background: black;
border-radius: 50%;
height: 23px;
width: 23px;
line-height: 23px;
font-size: 17px;
text-align: center;
color: white;
font-weight: 900;
cursor: pointer;
}