With the introduction of the GitHub Pages Gem, building and testing GitHub Pages sites on a local computer has become significantly more convenient, allowing users to preview and troubleshoot their sites before making them live. By installing the Gem via the command gem install github-pages or using Bundler with gem 'github-pages' in a Gemfile, users can mirror the GitHub Pages server environment locally. As GitHub updates its servers, users can effortlessly update their local setup with gem update github-pages or bundle update github-pages, ensuring consistency between the local and published versions of their sites. Ben Balter, the Chief of Staff for Security at GitHub, emphasizes the ease of using the Gem and highlights his extensive experience in managing GitHub’s enterprise offerings, trust and safety efforts, and promoting open source adoption among government organizations worldwide.