How do I connect Google Analytics?

In the order event processing code, add the data to Google Analytics. You will get something like this:

window.bukzaCallbackFor[Widget Container ID] = function(payload){
    switch(payload.message.event){
        //other handlers
        case 'ORDER_COMPLETED':
            gtag('event', 'purchase',
            {
                "value": payload.message.data.total
            });
            break;
    }
};

The Google Analytics initialization code must already be added to the page with the widget. Learn more about sending data to Google Analytics here.