gRPC generates client and server stubs from `.proto` files — microservicesAn architecture splitting applications into small independent services — each deployed and scaled separately. call each other with typed contracts, streaming, and load balancing built in. KubernetesAn orchestration system for containers — schedules, scales, and manages fleets of services in production., etcd, and cloud APIs adopted it beside RESTRepresentational State Transfer — a style for web APIs using HTTP methods and resource URLs. and GraphQL. Example: a GoA language from Google — simple syntax, fast compilation, and built-in concurrency via goroutines. service exposes `GetUser` over HTTPHyperText Transfer Protocol — the protocol browsers use to request and receive web pages./2; a PythonA high-level language known for readability — dominant in data science, scripting, and web backends. client calls it with generated stubs.

gRPC became the default RPC layer for cloud-native microservicesAn architecture splitting applications into small independent services — each deployed and scaled separately. after Google's release.

It standardized efficient service-to-service communication with schema-first contracts.