Conventionally, install puts the outputs in their where they will live for use. It does so in a way that 'make uninstall' will leave things as they were before

Conventionally, install puts the outputs in their where they will live for use. It does so in a way that 'make uninstall' will leave things as they were before install. The install target should also run any pre- and post-install commands. There's also a 'make dist' convention, to build a release tarball.