Google Tag Manager Ecommerce Enhancement conversation on Shopify Website

Nowadays all clients asking for Ecommerce customer Enhancement update to capture data at Google Tag Manager Layer

First, we have to put the Global site tag on the theme.liquid

Below whole code we have to put on Shopify admin.
Setting ➔ Checkout ➔ Order processing

https://yourdomain.myshopify.com/admin/settings/checkout

enhanced_conversion_data variable where you have to add all additional details which you require

{% if first_time_accessed %}


{% endif %}