First of all you need the protoc compiler installed and configured, please follow the instructions here.
Every example contains its depedencies with go modules(it comes build-in with go) and a makefile that contains 2 commands build and run. If you build you will generate protopb files in go. To run a command just need to do with make command followed with the target(action).
- make build
The idea is that you can play with them easily and quick, Enjoy them!.