What is Microsoft Azure? – The Cloud Platform That Powers Modern Business
Azure is on every IT job description, every cloud certification, and every enterprise technology conversation. Before going deeper into how it works, it helps to understand clearly what it actually is.
- What Microsoft Azure is and how it fits into the broader cloud computing landscape
- The scale of Azure's global infrastructure and why it matters
- The main categories of services Azure provides and what each covers
- Why Azure is particularly relevant for enterprise and hybrid cloud environments
What is This Topic?
Microsoft Azure is Microsoft's cloud computing platform — a continuously expanding collection of cloud services that organisations use to build, deploy, and manage applications and infrastructure through Microsoft's global network of data centers.
In practical terms, Azure gives you access to computing power, storage, databases, networking, AI, analytics, security, and development tools — all delivered over the internet, on demand, and billed based on consumption. You access these services through the Azure Portal, command-line tools, or APIs, from anywhere in the world.
Azure is one of the three dominant public cloud platforms globally, alongside Amazon Web Services and Google Cloud. It holds particular strength in enterprise environments, hybrid cloud scenarios where organisations need to connect on-premises systems with cloud services, and organisations already running Microsoft products like Windows Server, SQL Server, and Microsoft 365.
Why Does This Matter?
Every topic in the AZ-900 curriculum is specifically about Azure. Understanding what Azure is, how it is structured, and what it provides is the foundation for everything else in this series. In real IT roles, Azure knowledge is one of the most in-demand cloud skills globally — and it is particularly valuable in organisations that run Microsoft-centric technology stacks.
Understanding what Azure is, how it is structured, and what it provides is the foundation for everything else in this series.
The Real-World Story
Think about a large industrial estate on the outskirts of a city — the kind where dozens of different businesses operate side by side, each with their own unit.
The estate management company provides shared infrastructure that every tenant uses: roads, power supply, water, security at the entrance, fire safety systems, and maintenance of common areas. Each tenant business does not build their own roads or install their own power grid. They move in, connect to the shared infrastructure, and focus entirely on running their own business.
Azure is the estate management company for technology. The infrastructure — servers, networking, storage, security systems, power, and physical facilities — is Microsoft's. The tenants are the businesses and developers who use Azure to run their applications, store their data, and build their products. Each tenant works in their own isolated space using shared infrastructure they never have to manage themselves. Some tenants need a small unit. Some need a large complex of buildings. Azure accommodates both without either one affecting the other.
Going Deeper
Azure launched in 2010 as Windows Azure, initially focused on platform services for .NET developers. Over the following decade and a half it expanded dramatically to become a comprehensive cloud platform covering virtually every category of cloud service a modern organisation might need.
Today Azure offers over two hundred distinct services organised into categories. Compute services include Azure Virtual Machines for IaaS workloads, Azure App Service for web application hosting, Azure Kubernetes Service for containerised applications, and Azure Functions for serverless event-driven computing. Storage services include Azure Blob Storage for unstructured data, Azure File Storage for shared file systems, and Azure Table and Queue Storage for application data. Networking services include Virtual Networks, Azure Load Balancer, Application Gateway, VPN Gateway, and ExpressRoute for private connectivity.
Beyond core infrastructure, Azure provides managed database services including Azure SQL Database, Azure Cosmos DB for globally distributed NoSQL data, and managed services for MySQL and PostgreSQL. Azure AI and Machine Learning services give developers access to pre-built AI models and custom machine learning infrastructure. Azure DevOps and GitHub integration support software development lifecycle management. Azure Monitor and Microsoft Defender for Cloud handle observability and security across the platform.
Azure's particular strength in enterprise environments comes from its deep integration with Microsoft's broader product ecosystem. Azure Active Directory — now called Microsoft Entra ID — provides identity services that connect seamlessly with Microsoft 365, Windows Server, and thousands of third-party applications. Azure Arc extends Azure management capabilities to on-premises and multi-cloud environments. This integration makes Azure a natural choice for organisations with significant existing Microsoft infrastructure investments.
Azure operates from over sixty regions worldwide, making it one of the most geographically distributed cloud platforms available. This global footprint supports both the regulatory data residency requirements many organisations face and the performance needs of applications serving users across different geographies.
- Microsoft Azure is a comprehensive cloud platform providing over two hundred services across compute, storage, networking, databases, AI, security, and more.
- Azure is one of the three dominant global cloud platforms and holds particular strength in enterprise and hybrid cloud environments.
- Azure's deep integration with the Microsoft product ecosystem — Windows Server, SQL Server, Microsoft 365, and Microsoft Entra ID — makes it the natural cloud choice for Microsoft-centric organisations.
- Azure operates from over sixty regions worldwide, supporting global data residency requirements and low-latency access for users across different geographies.
- Understanding Azure's structure, services, and strengths is the foundation for everything else in the AZ-900 curriculum.
