A fully qualified domain name is also known as FQDN, which consists of
two parts- hostname and domain name. Let’s consider your web address-
it’s like www.yourdomain.com. The www here is the host and
yourdomain.com is the domain name.
Please visit https://www.infobeehive.com/domain/what-is-a-domain-name-web-hosting-guide/ for details.