Organisation— An organization represents a business entity that is using Microsoft cloud offerings. The organization is a container for subscriptions.
Azure subscription— A subscription is an agreement with Microsoft to use one or more Microsoft cloud platforms or services
User Acccount— User accounts for all of Microsoft’s cloud offerings are stored in an Azure Active Directory (Azure AD) tenant. An Azure AD tenant can be synchronized with your existing Active Directory Domain Services. Multiple subscriptions of an organization can use the same Azure AD tenant.
Azure AD tenant— A dedicated and trusted instance of Azure AD that’s automatically created when your organization signs up for a Microsoft cloud service subscription, such as Microsoft Azure, Microsoft Intune, or Microsoft 365. An Azure tenant represents a single organization.
Resource— A manageable item that is available through Azure. Virtual machines, storage accounts, web apps, databases, and virtual networks are examples of resources. Resource groups, subscriptions, management groups, and tags are also examples of resources.
Resource group— A container that holds related resources for an Azure solution. The resource group includes those resources that you want to manage as a group. You decide which resources belong in a resource group based on what makes the most sense for your organization. See Resource groups.
Resource provider— A service that supplies Azure resources. For example, a common resource provider is Microsoft.Compute, which supplies the virtual machine resource. Microsoft.Storage is another common resource provider. See Resource providers and types.
Azure Stock Keeping Unit(SKU)— It represents a purchasable Stock Keeping Unit (SKU) under a product. It can be of different type depends on product. Kind of Item for sale !
Azure compute unit (ACU)— The Azure Compute Unit (ACU) is used in understanding the relative compute performance between different Azure compute series VMs. Microsoft uses the ACU concept to help you compare computing performance across the different types of compute VM SKUs.
Azure Service principal— An Azure service principal is an identity created for use with applications, hosted services, and automated tools to access Azure resources.
Azure App Registration- In order to delegate Identity and Access Management functions to Azure AD, an application must be registered with an Azure AD tenant. When you register your application with Azure AD, you are creating an identity configuration for your application that allows it to integrate with Azure AD.