The Wayback Machine - https://web.archive.org/web/20201001223915/https://docs.github.com/en/enterprise-server@2.21/github/visualizing-repository-data-with-graphs/about-repository-graphs

About repository graphs

Repository graphs help you view and analyze data for your repository.

A repository's graphs give you information on contributors and commits to the repository, and a repository's forks and network. If you maintain a repository, you can use this data to get a better understanding of who's using your repository and why they're using it.

Further reading