ACM validations in AWS refer to the process of validating domain ownership when using AWS Certificate Manager (ACM) to issue SSL/TLS certificates. This involves proving control over the domain for which the certificate is requested, typically through DNS or email validation methods.

ACM (AWS Certificate Manager) validations in AWS refer to the process of verifying domain ownership or control before issuing an SSL/TLS certificate. This can be done through DNS validation, where a specific CNAME record is added to the domain's DNS settings, or through email validation, where an email is sent to the domain owner for confirmation.