Podman doesn't have a daemon like Docker does. It also more tightly integrates with buildah, which the article doesn't expand on. Have a look at this (very brief) overview to get a bit better idea of their relationship: https://github.com/containers/buildah#buildah-and-podman-rel...
Podman also uses the same notion of pods, and it doesn't support docker-compose syntax/files, because RedHat strongly believes that Kubernetes has already won. Basically, podman/podlib allow you an easy migration path from your local computer to a k8s cluster, with the same images and same concepts. Have a look here: https://github.com/containers/buildah#buildah-and-podman-rel...