Just as Docker Registry (https://docs.docker.com/registry/) is a place where we can publish our container images and make them accessible to others, we can use Chart repository to accomplish similar goals with our Charts.
A Chart repository is a location where packaged Charts can be stored and retrieved. We'll use ChartMuseum for that. There aren't many other solutions to choose. We can say that we picked it because there were no alternatives. That will change soon. I'm sure that Helm Charts will become integrated into general purpose repositories. At the time of this writing (June 2018), Charts are already supported by JFrog's Artifactory (https://www.jfrog.com/confluence/display/RTF/Helm+Chart+Repositories). You could easily build one yourself if you're adventurous.
All you'd need is a way to store index.yaml file that contains...
