Example of how to customize the Yoast SEO breadcrumbs #yoast #plugin #wordpress

yoast_seo_breadcrumb_add_woo_shop.php

<?php
/********* DO NOT COPY THE PARTS ABOVE THIS LINE *********/

/*
 * Add shop link to the Yoast SEO breadcrumbs for a WooCommerce shop page.
 * Credit: https://wordpress.stackexchange.com/users/8495/rjb
 * Last Tested: Apr 20 2017 using Yoast SEO 4.6 on WordPress 4.7.3
 */

add_filter( 'wpseo_breadcrumb_links', 'wpseo_breadcrumb_add_woo_shop_link' );

function wpseo_breadcrumb_add_woo_shop_link( $links ) {
    global $post;

    if ( is_woocommerce() ) {
        $breadcrumb[] = array(
            'url' => get_permalink( woocommerce_get_page_id( 'shop' ) ),
            'text' => 'Shop',
        );

        array_splice( $links, 1, -2, $breadcrumb );
    }

    return $links;
}