What does ACME mean in MANAGEMENT

ACME or Automatic Certificate Management Environment is a network protocol for managing the automatic issuance, renewal, and revocation of SSL/TLS certificates. The protocol is defined by IETF RFC 8555 and has been adopted as an official standard by the Internet Engineering Task Force (IETF).

The ACME protocol relies on the client obtaining cryptographic challenges from the server; the client then proves its control of a domain name by responding to those challenges. Once this proof has been obtained, the server provides a certificate that can be used with TLS connections.

One major benefit of using ACME is improved security, as it enables shorter certificate lifetimes and allows for automatic revocation if needed. In addition, since ACME-based certificates can be automatically renewed before they expire, there's less need to manually handle renewals.

Generally speaking, there is no cost associated with using ACME itself; however, some Certificate Authorities may charge for issuing or renewing your certificates using ACME or provide additional services for a fee.

Yes - many modern hosting providers offer support for managing multiple domains from one account when they are enabled to use an ACME server such as Let's Encrypt.