Replit

1.Site analytics

Open the site in Studio and copy the Embed snippet.
In the Replit project, open the HTML entry or framework layout that wraps every page.
Paste the snippet once before </body>.
Run or redeploy the Repl.
Open the public URL and confirm a visit in Site Analytics.

Open the site in Studio and go to Settings → Domain.
Connect blog.yourdomain.com, add the CNAME Studio shows, then verify.
In the Replit project, add a Blog link in the page navigation to https://blog.yourdomain.com.
Redeploy the Repl.