Google code for reviews shopify checkout

shopify-reviews.liquid

<code>
{% if customer.default_address.country | json  == 'United Kingdom' %}
{% comment %}
Delivery may take up to 7 days in this case so we're doing date + 7 days and assigning it.
{% endcomment %}
{% assign seconds = 7 | times: 24 | times: 60 | times: 60 %}
    <script src="https://apis.google.com/js/platform.js?onload=renderOptIn" async defer></script>
    <script>
        window.renderOptIn = function() { 
        window.gapi.load('surveyoptin', function() {
        window.gapi.surveyoptin.render(
        {
          // REQUIRED
          "merchant_id": enter your merchant id here,
          "order_id": "{{ order.id }}",
          "email": "{{ customer.email }}",
          "delivery_country": "GB",
          "estimated_delivery_date": "{{ "now" | date: "%s" | plus: seconds | date: "%Y-%m-%d" }}",
          // OPTIONAL
          "opt_in_style": "CENTRE_DIALOG"
        }); 
    });
    }
    </script>

{% endif %}
</code>

Google shopping reviews for Shopify. This example uses the UK only as the delivery country & an estimated delivery time of 7 days.

Things you need to edit:
delivery_country
estimated_delivery_date

It then needs to go in your checkout additional scripts section and paste there.

do i have to make shopify-reviews.liquid or just add in checkout page

PLEASE HELP

how will i know that code is working or not

you'll know if you go to order status page - you will see popup and can inspect console etc.