GitHub Enterprise 2.9 introduces several new features and enhancements aimed at improving reliability, flexibility, and collaboration for both developers and administrators. The release includes support for load balancers to enhance deployment reliability and a new hosting option on Google Compute Engine for increased installation flexibility. Developers benefit from enhancements to pull requests, including the ability to resolve merge conflicts directly in the UI, request and track reviewers, dismiss invalid reviews, and utilize the "Rebase and merge" option to avoid merge commits. Organization-wide Projects allow teams to manage work across repositories more efficiently, while improvements like searchable commit messages and progressively loaded diffs enhance the overall user experience. Users are encouraged to upgrade to GitHub Enterprise 2.9 to take advantage of these features and review the release notes for additional updates.