In which cases is it preferable to use gRPC for communication between services?

gRPC is preferred in the following cases:

• When high performance and low latency in communication between services are required, as gRPC uses HTTP/2 and a binary protocol.
• For microservices architecture, where strict contract definitions via Protocol Buffers are important.
• When bidirectional streaming of data is needed.
• If cross-platform support and multiple programming languages are important.

Example: if you have several microservices in Go and other languages that need to exchange data quickly and efficiently with clearly defined APIs, gRPC would be a good choice.