Yes. Point a domain or subdomain you own at your site and it serves there with a certificate set up automatically, so the padlock shows without you touching a setting. On some registrars it’s a one-click connect from the Branding page; on the rest it’s one record in your DNS settings, and the page tells you exactly what to paste. Connecting a custom domain is what makes a show white-label.
FAQs: Your site, emails, and your own domain