Hello kumiduck10,
To copy the meta tag into the HTML source of your WordPress site’s homepage, follow these steps:
- Log in to your WordPress site.
- From the dashboard, go to Appearance and then select Theme Editor.
- On the right-hand side, find the header.php file and click on it.
- Scroll down until you find the tag.
- Paste the meta tag you received from Facebook just before the tag.
- Click on Update File to save changes.
- Return to your Facebook Business Manager and click Verify Domain.
- Facebook will now check for the meta tag on your homepage. Once it is verified, you will receive a confirmation message from Facebook.
That’s it! You have successfully verified your domain on Facebook using the meta tag.
Here is a link that you might also find helpful: https://www.nexcess.net/blog/how-to-add-meta-tags-to-wordpress/