How do I add Google Analytics tagging?

In your selected inksapce, go to the “Exports” tab and select "Tracking" for a particular export. Toggle "Active" (1) to activate the "Google UMTs builder" section, then can click "Auto tagging" (2). UTMs will be added automatically (3) to each product link in your export. The preview shows (4) how your product link will look like. 

You can also modify manually any of these values and use other "Internal elements" by simply transferring them from the "Available macros" section to the selected UTM.