AWS Secrets Manager allows you to store, manage, and retrieve secrets through the AWS Management Console, CLI, or SDKs. When you store a secret, it is encrypted using AWS KMS (Key Management Service) and can only be decrypted by authorized users or applications. This ensures that your sensitive data is protected both in transit and at rest. Additionally, AWS Secrets Manager supports automatic secret rotation, which means that the service can periodically update your secrets without any manual intervention. This is particularly useful for email marketers who want to minimize the risk of security breaches due to outdated or compromised credentials.