How to hide a website?

You can do it by redirecting the google bot using PHP,
I saw some code snipper here back in days, search and you will find it

Manually block all possible devices and resolutions

bossofthebosses said:

There's no way to do this safely, there will always be a site wide manual action penalty risk - if G catches you, your site will be de-indexed

Click to expand...

Google not always so smart as u think! ))
I use cloaker FinalCloak since many year and have +50 sites up years that use this.
Sure is not "safe" to cloak there always risk to get problem but u can get away with it very long.
Never have site deindexed for cloaking since i use method and know many other here who use same tool and no problem.
Is just if you have bad cloaker soft that get you detected but if use a good tool it work )