There are a few ways to track your Shopify store in Google Analytics. The easiest way is to install the Google Analytics tracking code directly into your Shopify theme.
To do this, you'll need to create a Google Analytics account and get your tracking code. Then, you can add the tracking code to your Shopify theme in the Layout section of your theme editor.
If you're not comfortable editing your theme code, you can also use a Shopify app like Google Analytics by BILLINGOR. This app will add the tracking code to your store for you.
Once you've added the tracking code to your store, you'll be able to track your Shopify data in Google Analytics. You can see things like how many visitors you have, where they're coming from, what pages they're looking at, and more.
To learn more about tracking your Shopify store in Google Analytics, check out this help doc from Shopify.