The Jekyll SEO Tag plugin simplifies the process of optimizing GitHub Pages for search engines and social media sharing by automatically adding essential metadata, such as titles, descriptions, and URLs, to each page. This ensures better indexing by search engines and rich displays on platforms like Facebook and Twitter. Although users could manually add these metadata tags, the plugin offers a reliable template based on best practices, enhancing visibility alongside the Jekyll sitemap plugin. The post is authored by Ben Balter, GitHub's Chief of Staff for Security, who has an extensive background in managing GitHub's enterprise offerings and promoting open source adoption within government organizations.