GitHub Pages has introduced HTTPS support for custom domains, enhancing security and performance for over a million sites. This update encrypts traffic between GitHub's servers and users' browsers, ensuring secure communications and data integrity, and involves a partnership with Let's Encrypt, making GitHub a Silver-level sponsor of the initiative. Users utilizing CNAME or ALIAS records for their custom domains are automatically set for HTTPS, while those using A records need to update their DNS settings for compatibility. The new IP addresses not only enable HTTPS but also integrate a content delivery network (CDN) for faster site loading times and additional protection against DDoS attacks. Although previous IP addresses will remain for a transition period, migrating to the new addresses is recommended to enjoy improved speeds and security. More detailed guidance and support are available in the documentation, with direct assistance offered for any issues.