How can I track Google Ads conversions on my checkout page?

[haichit]

I want to install google ad conversions for my store But I can't edit the checkout page. My conversion code shows all pages except the checkout page. How to add google asd conversion code to checkout page?

[Treet]

@haichit checkout page access is not available on shopify plans except Shopify Plus. However, the conversation code can be added to the thank you page instead of checkout. 

Settings->checkout and accounts->additional scripts  ( place your code here including additional header tag) 

More details here Shopify KB