What is AWS CloudFormation?

AWS CloudFormation is an infrastructure as code (IaC) service that helps you model and set up AWS resources using templates. It allows you to treat your infrastructure as code, defining all AWS resources in text files. CloudFormation automates the provisioning and updating of infrastructure in a safe, repeatable manner across AWS accounts and regions. It manages dependencies between resources, supports rollback on errors, and provides change sets to preview how changes will impact running resources. CloudFormation enables version control of infrastructure, automated testing, and consistent deployment across environments.