How to add a wildcard DNS record?
Wildcard subdomains are useful when you wish to redirect all visitors to your website regardless of what subdomain they access your website through. This is also useful when someone mistypes www for example and writes ww.yourdomain.com.
In other words, with wildcard subdomains, it won’t matter whether someone accesses your site through ww.yourdomain.com or wwwwww.yourdomain.com.
Wildcard subdomains are also handy when configuring subdomain multisite applications such as WordPress.
To enable wildcard subdomains *.yourdomain.com, go to your Site Tools > Subdomains. By default, it is created and you could enable it from there.