Does SiteGround support Domain Mapping?
Domain Mapping is practically called when you are pointing multiple domains to a single application, hosting account or directory. In most of the cases, domain mapping means to be able to open a single application using different domains.
SiteGround supports that and you can achieve it by using the Addon Domain (adding a new domain pointing to the existing document root of another domain) / Parked Domain functionality available in the cPanel. This way, you will be able to map multiple domains to one and the same application.
Note: In order to successfully configure the domain mapping, keep in mind that some applications like WordPress are domain-dependent and can work properly only with the domain name specified in its configuration.