How do search bots and others see sites?

Question

Search engines

Tell me how securely it will be to hide the site admin panel by simply removing it to an address like domain.com/admin43534534fdsfsd
I understand correctly that if no links from my site are accessed by it and it is not specified in any special files for indexing, then this path it is almost impossible to detect by any search robots, etc. ?
And therefore if, without strong paranoia, this is enough for a regular site?
To protect against all possible password guessing, etc. if you leave it just on domain.com/admin

Answer 1

This precaution is a little less than useless.
I will explain why:
1) The pages that we visit can merge search engines with our own browsers.
2) In order for search engines not to index the desired page, it is enough to prohibit access to the directory where it is located in robots.txt or use noindex in the page itself. 3) Password guessing works if the login is known, and if the login is not trivial, then there is nothing to pick up.
4) To protect the site, more attention should be paid to ensuring that authorization data goes through https, passwords are stored in a hashed state with a salt, and there are no sql and xss injections.

Answer 2

https://yandex.ru/support/webmaster/controlling-ro...
https://support.google.com/webmasters/answer/60625...