Introduction to Google Url Verification
Verification has two steps, verification and claiming. Verification proves that you have control over the URL, and claiming lets Google know in which Google account you want to use the URL. You can only claim the URL in one Google account, but you can verify it in many of them.
Verification must be done first via Google Search Console (formerly Webmaster Tools). Claiming is done on the Google Merchant Center Business Information page. Both steps must be completed in order for your product listings to be accepted by Google.
We recommend that you verify and claim the root or parent domain of your website, without any prefixes. For instance, use "walmart.com" rather than "www.walmart.com". Verifying the former automatically verifies the latter, as well as any other sub-domains.