A domain is an identification string that is the address to your web presence. You need to have a domain to create a website and associated custom domain email addresses for your business. This makes it easier for your potential customers to find you on the internet, locate information, or contact you. All they have to do is type the name of your domain (name.tld) to land on your website. In 'name.tld', 'name' refers to the name of your business, and 'tld' or top-level domain denotes .com, .net, .online, .site, etc.