What does /etc/resolve.conf actually contain - does it contain the server's own IP or does it contain the upstream delegator?

I have looked at various resolve.conf questions on here and other documentation but they're talking about DNS as an external thing, which doesn't help me distinguish in this case. - I have a server. The server has some sort of DNS issues. - The server runs Linux (CentOS 7.9) and has 2 IP addresses that point to it. - The server has a /etc/resolve.conf which contains two *other* IP addresses. Should these *other* IP in resolve.conf be the 2 that point to the server or should they be 2 "stranger" IPs pointing to upstream? THanks