You can set up a domain name that you own to point to another domain name. This is known as "parking" a domain.

Example: You own the business.com and innovation.com domain names. You already have a web site for business.com.au, but you do not want to create a new website for innovation.com at the moment. By parking innovation.com on top of business.com, all URLs for innovation.com.au will automatically go to business.com instead.