====== Change Set ======

**What it is:** A preview of changes CloudFormation will make to a stack before applying them.

**What it’s for:**
  * Reduce risk by reviewing what will be created/modified/deleted.
  * Improve change control and approvals.

**Key ideas:**
  * You can inspect the change set, then execute it.
  * Useful in production environments.

**Exam cues:**
  * “review changes before applying” → change set.

**Hard words:**
  * *preview* /ˈpriːvjuː/: xem trước
  * *execute* /ˈeksɪkjuːt/: thực thi
  * *approval* /əˈpruːvl/: phê duyệt