Azure Command-Line Interface (Azure CLI) is a command-line tool for managing Azure resources and services from a terminal or command prompt. It provides an interface for configuring and deploying applications, managing Azure resources, and automating common tasks. It is designed to be used with scripting languages like PowerShell and Bash, and is available on Windows, macOS, and Linux. Azure CLI is a useful tool for developers and administrators who need to work with Azure services and resources through a command-line interface.