Azure is Microsoft's public cloud computing platform, providing a wide range of cloud services.
Azure offers four forms of cloud computing: IaaS, PaaS, SaaS, and Serverless functions.
The core architectural components of Azure include Azure regions, availability zones, resource groups, and Azure Resource Manager (ARM).
Azure regions are geographical areas with data centers, while availability zones are separate locations within a region for disaster recovery. Resource groups serve as containers for related resources, and ARM is used for deployment and management.