Question about launching a new site: how to do it right?

Question

Search Engine Optimization

Hello. We are preparing to launch a new website. We use a subdomain to upload and test all the functionality and content and then transfer it to the main domain. The admin panel is locked with a password. Will the search engine see our site and how to properly prepare the launch of the site, turn off the main domain and do it there or use a subdomain?

Answer 1

The search engines will see. The same Crome and Yandex Browser accurately send data from visited urls. If you do not want the subdomain to be indexed, then the best way would be to whitelist the ips for which entry is allowed, and block everything else. Robots file, noindex headers, etc. are only recommendations for search engines and are often ignored.
In no case do not disable the main domain.

Answer 2

Just close the web site with a password on a subdomain