This is Command Line Interface or in short, CLI that is defined as the set of commands used to create and handle Azure resources. This Azure CLI is available across all the Azure services, that assist you in working efficiently with Azure. Azure CLI also lays emphasis on automation to allow you to get your work done by reducing the number of redundant tasks. If you wish to learn Azure, then I would recommend you to check out the Azure certification course, from Intellipaat. if you are a novice, then I would suggest you check out the latest YouTube video on Azure Tutorial for Beginners.