I use Makefile as a wrapper for build / test bash commands. For example I often define these targets:

- make test : run the entire test suite on local environment

- make ci : run the whole test suite (using docker compose so this can easily be executed by any CI server without having to install anything other than docker and docker-compose) and generate code coverage report, use linter tools to check code standards

- make install-deps : installs dependencies for current project

- make update-deps : will check if there is a newer version of dependencies available and install it

- make fmt : formats the code (replace spaces for tabs or vice-versa, remove additional whitespaces from beginning/end of files etc)

- make build : would compile and build a binary for current platform, I would also defined platform specific sub commands like make build-linux or make build-windows