The tutorial provides a comprehensive guide on deploying a gRPC service to Kubernetes and making it accessible externally using Kong's Kubernetes Ingress Controller, with a practical example featuring a service that delivers quotes from the science fiction novel "Dune." It outlines the foundational aspects of gRPC, which uses HTTP2 for transport and Protocol Buffer (Protobuf) for interface definitions, highlighting its advantages over traditional REST APIs, such as bidirectional streaming and efficient binary encoding. The author demonstrates setting up a Kubernetes deployment with TLS security using a self-signed certificate, configuring the Kong Ingress Controller and cert-manager to automate certificate management, and integrating these with the gRPCS protocol for secure communication. The tutorial concludes by testing the service using Insomnia to verify the functionality of the GetQuote and GetQuoteStream methods, and it encourages readers to explore further Kubernetes tutorials and engage with the Kong community for additional support and resources.