Securing a domain or domain name is the first step in creating an online presence that will help you get found by prospects on Google and other search engines. A domain is a part of the web address nomenclature someone would use to find your website or a page of your website online. It is a string of text associated with the numerical IP address of a website that's much easier for people to remember and search.
Every website has an IP address, which is a unique string of numbers that connect computers to web servers. IP addresses are great for computers, but difficult for people to memorize. That's where domains come in. A domain name is connected to a website's IP address so people can more easily remember and search for a website by its domain and their browser can still find the specific web server that hosts the website via the associated IP address.
A domain is often compared to a home address. Your friends don't memorize your house's GSP coordinates every time they want to visit you. Instead, they just plug in your street address into their phones. The same goes for visiting a website. Instead of memorizing a website's IP address, visitors simply type in the domain into their browser.