WooCommerce Excerpt Alot-plugin

Simple. See this source code for details:

<?php
/**
* Plugin Name: WooCommerce Product Teaser
* Plugin URI: http://wiki.devliegendebrigade.nl/WooCommerce_Product_Teaser_(plugin)
* Description: Add teasers to products on the WooCommerce product page
* Version: 0.1
* Author: Jeroen Strompf - http://devliegendebrigade.nl/
*
*/

// woocommerce_product_teaser_display_excerpt()
///////////////////////////////////////////////
//
// Just a function with an arbitrary name
// It does one thing: Call function the_excerpt(), which
// outputs the excerpt/teaser/stuff before the read-more-tag of the current object
//
function woocommerce_product_teaser_display_excerpt() {
     
    the_excerpt();

}

// hook
///////////////////////////////////////////////
//
// Add an action on hook 'woocommerce_after_shop_loop_item_title', 
// Namely: The call the function above.
//
add_action( 'woocommerce_after_shop_loop_item_title', 'woocommerce_product_teaser_display_excerpt', 40 );     

Bronnen

• https://code.tutsplus.com/tutorials/woocommerce-adding-the-product-short-description-to-archive-pages--cms-25435