Tags can be used to provide an alias instead of version numbers. For example, a project might choose to have multiple streams of development and use a different tag for each stream, e.
NPM Lifecycle scripts The “scripts” property of your package.json file supports a number of built-in scripts and their preset life cycle events as well as arbitrary scripts.
Many of you might be in a similar position to where I was, thinking lerna still served some sort of useful purpose in the node ecosystem, but no, it doesnt apparently.