Description: A stack set in AWS CloudFormation is a feature that allows for the coordinated and efficient management of multiple stacks of resources. This means that users can create, update, or delete several stacks across different AWS accounts and regions simultaneously. This functionality is particularly useful for organizations operating in complex cloud environments that require centralized management of their resources. By using stack sets, administrators can define a set of CloudFormation templates that describe the necessary resources, facilitating the deployment and maintenance of cloud infrastructures. Additionally, this feature allows for the reuse of templates and consistency in resource configuration, reducing the risk of errors and improving operational efficiency. In summary, stack sets are a powerful tool for automation and resource management in the cloud, enabling organizations to scale and adapt quickly to changing business needs.