Google documentation:


Verify and claim your website:

https://support.google.com/merchants/answer/176793?hl=en

You can verify a URL with Google using these steps:

  1. Sign in to your Google Merchant Centre account at https://merchants.google.com/
  2. From the navigation menu, click the tools icon  to the right in the top navigation bar
  3. Select Business information under “Tools.”
  4. Click the Website tab.
  5. Enter the URL for your online store, starting with https://
  6. Click Save.


Verify your site ownership:

https://support.google.com/webmasters/answer/9008080?hl=en


Our documentation for specific eCommerce platforms:


Bigcommerce

Verify using META tags

Verify using Tag Manager


Shopify 

Verify using META tags

Verify using Tag Manager


Magento 1

Verify using META tags

Verify using Tag Manager


Magento 2

Verify using META tags

Verify using Tag Manager


Woocommerce

Verify using META tags 

Verify using Tag Manager