The things need to be considered to hide footprints:

Unique Name Servers

One of the first traps that many digital novices stumble into is not factoring in what effect similar name servers can have on their private blog network.
if you have a lot of domains on a nameserver that points to the same web host, even if they have different IP addresses, Google can become suspicious.
Read more @ https://www.auxiliarytech.com/2019/04/how-to-host-websites-without-any.html