Adding a meta tag to your site is very easy.
Go to "Site Settings" on your Dashboard
Find the Advanced Section on the left toolbar
Click "New Meta Tag"
Meta Tags looks like a string of HTML code but it is made of a Name and Content values. here is an example:
<meta name="ct-2fa-verify" content="364cb752e359774">
Add the meta name and content values to their respective fields (do not include quotation marks.
Click update on the top right to save.