Vercel is introducing Wildcard Domains, which allows customers to choose their own HTTPS-enabled subdomains for deployment. This feature can be accessed through the Domains tab in a project's settings, where users can add a wildcard domain of their choice and configure it. Once configured, the domain will automatically be assigned to the latest production deployment, allowing users to capture all subdomains on the fly with minimal effort. The full power of Wildcard Domains was demonstrated with a demo project that showcases its capabilities in offering customizable workspaces or profiles for each user. With this feature, Vercel aims to provide highly customizable workspaces or profiles to each of its users without requiring special effort.