The easiest way to do this is to track Add To Cart events in Google Analytics (as you said, tracking any /cart visits).
Then, in a second step, you can import these conversions to Google Ads.
Make sure that you don't include Add To Cart conversions in your "Conversions" column, as Google should only optimize for the primary goal (sales).
Create a goal for it in Google Analytics. Presuming you have Enhanced Ecommerce setup as Shopify's native integration, in GA:
Hi, You have to follow these steps
@Leigh3366 If you go to your Behavior > Events report, Shopify pushes a lot of data in there for such things. So, what you can do is click-through the different event names and labels to find what lines up. It does push event information through for the checkout because it is required for enhanced ecommerce.
Another quick method a novice can use to find this information is to go to the real-time analytics section. Then, do the behavior yourself (checkout) to see what event gets pushed through.