Azure platform for building and managing microservices and container applications. Like a framework for building complex applications from many small, independent pieces.
A large enterprise uses Service Fabric to build a customer management system from dozens of interconnected microservices.
Azure Service Fabric is a Microsoft platform for building and operating microservices (stateful or stateless) and containers with built-in orchestration, scaling, and rolling upgrades. Other clouds offer container orchestration (often Kubernetes-based), but there is no direct 1:1 managed equivalent with the same programming model and stateful service features.