Adding a Custom Domain to Google Blogger
If you previously added a custom domain and now change it, the corresponding CNAME record value will not be displayed. The redirect will point to ghs.google.com, while the other record used for verification is longer and unique to each user. However, since it is not displayed again, there is no way to reconfigure it.
When I checked How to Bind a Custom Domain to Google Blogger?, I found the following information:
The second record is actually unnecessary. As long as the domain has already been verified in the current version of Google Search Console, there is no need to set it up. The first CNAME record is the same for everyone and should simply point to ghs.google.com.
I followed this approach, and it worked.
Additionally, in the Google Blogger Custom Domain Setup Guide, I learned that setting the TTL to 1 minute can speed up the process. Once the HTTPS status in Blogger's settings becomes available, you can then enable Cloudflare's "yellow cloud" CDN.
If you are only using a subdomain, such as blog.domain.com, and your root domain serves other purposes, keep the redirect option disabled in Blogger's settings.
To add Monetag ads, edit the HTML in the theme settings and insert both the site verification code and ad script inside the <head> section.
Monetag ads recommend using the In-Page Push ad format, as it is more user-friendly.