Identity and Access Management (IAM) is an identity management service that helps you securely control access to your resources. You use IAM to control who is authenticated (signed in) and authorized (has permissions) to use your resources and services.
With IAM, you can create and manage user accounts and grant them permissions for your resources without having to share your password or access key, helping you manage your resources efficiently. IAM ensures the security of these user accounts and reduces security risks for your enterprise information by allowing you to set account security policies.
IAM is free of charge, so you only need to pay for the resources in your account.