A domain extension is a suffix that succeeds your domain – like a .com.au, or .com.
There are various top-level domains (TLD) to choose from, with the most popular ones being .com, .net, .info, .biz, and .edu.
An important factor to consider when choosing a domain extension is how it matches your website’s purpose. So, if you’re running a commercial site, for example, you can opt for a .com. If you’re planning to launch a website for your non-profit, go for a .org.
There are also over 200 country code TLDs to choose from. Let’s say you are a business operating in Australia, you’d want to consider getting a .au domain extension to tell clients that you operate locally.