AWS Identity and Access Management (IAM) is a web service that helps you securely control access to AWS resources for your users.
IAM is used to control :
Identity – who can use your AWS resources (authentication)
Access – what resources they can use and in what ways (authorization)
IAM can also keep your account credentials private.
With IAM, multiple IAM users can be created under the umbrella of the AWS account or temporary access can be enabled through identity federation with corporate directory.or third party providers
IAM also enables access to resources across AWS accounts.
