What it is: Infrastructure as Code (IaC) service to create AWS resources using templates.

What it’s for:

• Deploy consistent infrastructure repeatedly.
• Track changes and roll back if deployment fails.

Key ideas:

• Uses templates (YAML/JSON) to create Stacks.
• Supports Change Sets for previewing changes.

Exam cues:

• “provision infrastructure via template” → CloudFormation.
• “repeatable deployments” → IaC.

Hard words:

• *infrastructure* /ˈɪnfrəˌstrʌktʃər/: hạ tầng
• *template* /ˈtemplət/: mẫu
• *provision* /prəˈvɪʒn/: cấp phát/tạo tài nguyên
• *rollback* /ˈroʊlˌbæk/: quay lui