Azure Stack is an extension of Azure that allows for a consistent hybrid cloud platform. It provides customers the ability to run applications on-premises while also having access to Azure services. Azure Stack offers support for containers, storage APIs, virtual machine sizes, Service Fabric deployments, IoT Hub, Event Hub, SQL Server 2019, and blockchain templates. Future development will focus on additional security features, proxy support, backup capabilities, and compliance certifications to further integrate Azure Stack with the Azure platform.