AWS has one primary account owner called the root user. The root user can create additional users, known as IAM users. These IAM users can be set up as administrators with the ability to create other IAM users. While the root user has complete access to all AWS account resources, IAM users operate with permissions defined by the root user. The root user's credentials also serve special purposes like account recovery and administrative tasks.
In AWS, the root user is the primary account owner with full administrative privileges and unrestricted access to all AWS services and resources. It is the account initially created when setting up AWS and has special capabilities for account management and recovery.