Where in the craft theme would I enter the below code? I'm trying to set up google shopping reviews on my shopify site and they've told me to do the below but I have no idea how to do that on my Shopify store.
1 - ensure <!DOCTYPE HTML> is added to the top of every webpage
2 - add the code snippet below to your order confirmation page and customize the variables as needed. The snippet integration will allow Google to display the Google Customer Reviews opt-in on your website.