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The service lifecycle defines how every Azure service is released for public use.
Every Azure service starts in the development phase. In this phase, the Azure team collects and defines its requirements, and begins to build the service.
Next, the service is released to the public preview phase. During this phase, the public can access and experiment with it so that it can provide feedback. Your feedback helps Microsoft improve services. More importantly, providing feedback gives you the opportunity to request new or different capabilities so that services better meet your needs.
After a new Azure service is validated and tested, it’s released to all customers as a production-ready service. This is known as general availability (GA).
The Azure updates page provides information about the latest updates to Azure products, services, and features, as well as product roadmaps and announcements.