add_filter( 'the_content', 'customizing_woocommerce_description' );
function customizing_woocommerce_description( $content ) {

    // Only for single product pages (woocommerce)
    if ( is_product() ) {

        // The custom content
        $args = array( 'taxonomy' => 'product_cat' );
$terms =  get_terms('product_cat', $args);

    $count = count($terms);
   // if ($count > 0) {

        foreach ($terms as $term) {
          /*  echo $term->description;*/



            $custom_content = '<p class="custom-content">' . __($term->description, "woocommerce").'</p>';

        // Inserting the custom content at the end
        $content .= $custom_content;
          //    }

    }
    }
    return $content;
}