Exclude categories from the feed

functions.php

<?php

function lw_gpf_exclude_product($excluded, $product_id, $feed_format) {
    // Return TRUE to exclude a product, FALSE to include it, $excluded to use the default behaviour.
    $cats = wp_get_post_terms( $product_id, 'product_cat', array( 'fields' => 'ids' ) );
    if ( in_array( 21, $cats ) ) {
        return TRUE;
    }
    return $excluded;
}
add_filter( 'woocommerce_gpf_exclude_product', 'lw_gpf_exclude_product', 11, 3);

Hi! Does this code exclude some products from a category? And how should I do to completely exclude all the products from the category?

Hi;

These snippets are part of the support for the Google Product Feed plugin. If you need assistance you'd need to open a ticket here: https://woocommerce.com/my-account/create-a-ticket/