Easy way to improve the “No products found” page in WooCommerce.

An easy to change this page is by hooks and filters. One example is to show featured products, plus a slider at the top (after the no products found message). You can see the shortcode (replace with your own). This has been modified from cssigniter

add_action( 'woocommerce_no_products_found', 'cssigniter_show_featured_on_no_products_found', 15 );
function cssigniter_show_featured_on_no_products_found() {
	?>
	<?php
echo do_shortcode('[smartslider3 slider="44"]');
?>
	<div class="search-featured-wrapper">

		<h3><?php esc_html_e( 'Featured Products', 'your-text-domain' ); ?></h3>
		<?php echo do_shortcode( '[products limit="6" columns="3" visibility="featured" orderby="rand"]'); ?>
	</div>
	<?php
}