Domain names are also known as web addresses, and they represent your online business, project or blog just like your street address represents your physical location.
Every country has its own domain extension, which is an important part of your full web address. For example, The Australian country extension is .au, and .com.au is the most popular option for businesses.
Having an Australian web address gives you a local presence for your business and brand. It also makes it easy for users to find and identify you in search engines as having a recognisable Australian address.