The AWS Command Line Interface (AWS CLI) is a unified command-line tool for managing Amazon Web Services from your terminal. Instead of clicking through multiple console pages, you can create, configure, and delete AWS resources using simple text commands that can be scripted, automated, and version-controlled. The CLI supports over 200 AWS services and provides both high-level convenience commands (like aws s3 sync) and low-level API access for precise control—making it equally valuable for quick ad-hoc tasks and production infrastructure automation.