Navigate to https://business.facebook.com/settings/ & login to your Facebook Profile.

Select the business manager of the business you want to verify a domain for.

Then scroll down, on the left side you will see a drop down tab named brand safety. Click on that.

You will an option to add a domain. Then Click on "Add" Button.

Create a new domain
You need a new domain for your business.

Click the "empty" field to insert the domain you want to verify.

Paste your domain on the empty field. Make sure you are not adding a URL i.e. https or // should not be present only the domain name should be there.

Now you will need to copy the meta-tag provided in the Domain Verification window.

Then that meta-tag needs to be placed on the website's home page HTML source code in the <head>...<head> section & needs to be published.

Note: Verification will fail if the meta-tag code is outside the <head> section or in a section loaded dynamically by JavaScript.

After you've published the home page , confirm that the meta-tag is visible by visiting and viewing the HTML source code.

After you've published the home page, confirm that the meta-tag is visible by visiting http://eewoo.io/ and viewing the HTML source.

After verifying that the meta-tag is present in the source code. You just need to click on verify domain. And the status will change from Not Verified to Verified.

Add a meta-tag
Verify this domain by copying and pasting the provided meta-tag code into the <head> ... <head> section of your website’s home page HTML code.
Copy this meta-tag:
<meta name="facebook-domain-verification" content="aupdsbh8f9uv6argo1dm608q5bx73u" />
Paste the meta-tag into the <head> ... <head> section of the website’s home page HTML source, and publish the page.
Note: Verification will fail if the meta-tag code is outside the <head> section or in a section loaded dynamically by JavaScript.
After you've published the home page, confirm that the meta-tag is visible by visiting http://eewoo.io/ and viewing the HTML source.
Click Verify domain.
Note: It may take up to 72 hours for Facebook to find the meta-tag code. If the domain status is still not verified, you’ll need to click Verify domain again or confirm the meta-tag is listed in the scrape results in the Sharing Debugger Tool.
Verify Domain

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