Google remarketing code for Shopify

remarketing.liquid

{% comment %}Create a file called `google-remarketing.liquid` in the snippets subdirectory of your template with the following code. Be sure to insert your merchant ID.{% endcomment %}
{% if template contains 'index' %}
    <script type="text/javascript">
        var google_tag_params = {
            ecomm_pagetype: 'home',
        };
    </script>
{% elsif template contains 'collection' %}
    <script type="text/javascript">
        var google_tag_params = {
            ecomm_pagetype: 'category',
        };
    </script>
{% elsif template contains 'product' %}
    <script type="text/javascript">
        var google_tag_params = {
            ecomm_prodid: '{{ product.metafields.google.gmc_id }}',
            ecomm_pagetype: 'product',
            ecomm_totalvalue: {{ product.price | money_without_currency }}
        };
    </script>
{% elsif template contains 'cart' %}
    <script type="text/javascript">
        var google_tag_params = {
            ecomm_prodid: [{% for item in cart.items %}'{{item.product.id}}'{% unless forloop.last %},{% endunless %}{% endfor %}],
            ecomm_pagetype: 'cart',
            ecomm_totalvalue: {{cart.total_price | money_without_currency }}
        }
    </script>
{% elsif template contains 'search' %}
    <script type="text/javascript">
        var google_tag_params = {
            ecomm_pagetype: 'searchresults'
        }
    </script>
{% else %}
    <script type="text/javascript">
        var google_tag_params = {
            ecomm_pagetype: 'other',
        };
    </script>
{% endif %}

<script type="text/javascript">
    /* <![CDATA[ */
    var google_conversion_id = << INSERT MERCHANT ID >>;
    var google_custom_params = window.google_tag_params;
    var google_remarketing_only = true;
    /* ]]> */
</script>
<script type="text/javascript" src="//www.googleadservices.com/pagead/conversion.js"></script>
<noscript>
    <div style="display:inline;">
        <img height="1" width="1" style="border-style:none;" alt="" src="//googleads.g.doubleclick.net/pagead/viewthroughconversion/<< INSERT MERCHANT ID >>/?value=0&amp;guid=ON&amp;script=0" />
    </div>
</noscript>


{% comment %} In Settings -> Checkout -> Additional scripts, add the following{% endcomment %}
<script type="text/javascript">
    /* <![CDATA[ */
    var google_conversion_id = << INSERT MERCHANT ID>>;
    var google_custom_params = window.google_tag_params;
    var google_remarketing_only = true;
    /* ]]> */
</script>
<script type="text/javascript" src="//www.googleadservices.com/pagead/conversion.js"></script>
<noscript>
    <div style="display:inline;">
        <img height="1" width="1" style="border-style:none;" alt="" src="//googleads.g.doubleclick.net/pagead/viewthroughconversion/<< INSERT MERCHANT ID>>/?value=0&amp;guid=ON&amp;script=0" />
    </div>
</noscript>