To implement domain verification, you need to choose between two different methods: 1) add a DNS TXT entry to your DNS record to confirm that you own the domain, or 2) upload an HTML file provided by Facebook to your web directory and confirm domain ownership in Business Manager.
If you are verifying a domain on behalf of a client (e.g. as an agency) please make sure that the domain is verified in the domain owner's Business Manager. They can always share access to the domain with your Business Manager later.
The DNS Verification tab of your selected domain provides the TXT information you will need to add to your DNS record.
The precise steps you need to perform to add a DNS TXT entry to your DNS record may vary by domain host.
The HTML File Upload tab of your selected domain provides the HTML verification file you need to upload to your website.
You need admin access to your website's root folder to perform this type of verification.
You can still add Open Graph tags to your website to indicate ownership. This does not require the use of Business Manager. You can find more information about implementing the
fb:pages tag in the Open Graph - Object Properties documentation.
Including Open Graph tags that contain all relevant Page IDs on your website is not always ideal because it requires updating markup on your websites, which can be burdensome, and requires the maintenance of the list of Page IDs without any supporting tools. Having domains as an asset in Business Manager allows for easier maintenance of any list of Pages without any editing of your website's markup tags.