Where to put gtag tracking codes in Shopify store having Empire theme?

[AdKitan]

I need a hand. In the Empire theme of my Shopify store, I need to put corresponding tracking codes:

//when a product is viewed in store
  gtag('event', 'view_item', {
    'send_to': ‘…..’,
    'value': …..,
    'items': [{
      'id': ‘…….’,
      'google_business_vertical': ‘…….’
    }]
  });
 
//when a product is added to cart
  gtag('event', 'add_to_cart', {
    'send_to': ‘…..’,
    'value': …..,
    'items': [{
      'id': ‘…….’,
      'google_business_vertical': ‘…….’
    }]
  });
 
 
//when a product is purchased
  gtag('event', 'purchase', {
    'send_to': ‘…..’,
    'value': …..,
    'items': [{
      'id': ‘…….’,
      'google_business_vertical': ‘…….’
    }]
  });

Can someone please, share step-by-step instructions how and where to put these codes exactly, in order to make them do the right thing?

Also, should I call any other script in section, and which?

What additional things I need to do?

Where can I read more about these and similar things?

My store theme is Empire theme. The upper codes need to be placed in the theme itself. Where exactly in the theme I need to put those codes to do trackings when a product is viewed in store, when a product is added to cart and when a product is purchased, as stated just above each piece of script.

Please, be as precise as you can.

Thank you a lot!

[NidhiG]

I think you want to add custom events to google analytics.

Paste this code in product's liquid Page

//when a product is viewed in store  gtag('event', 'view_item', {
    'send_to': ‘…..’,
    'value': …..,
    'items': [{
      'id': ‘…….’,
      'google_business_vertical': ‘…….’
    }]
  });

same way add to cart should fire on the button click event

//when a product is added to cart  gtag('event', 'add_to_cart', {
    'send_to': ‘…..’,
    'value': …..,
    'items': [{
      'id': ‘…….’,
      'google_business_vertical': ‘…….’
    }]
  }); 

 This should be placed in an additional script area.

//when a product is purchased  gtag('event', 'purchase', {
    'send_to': ‘…..’,
    'value': …..,
    'items': [{
      'id': ‘…….’,
      'google_business_vertical': ‘…….’
    }]
  });

 Hope you are familiar with the code files.If not let me know.I can help you out.