In oversimplified terms, a domain name is a character string that identifies an Internet resource. Most people think of something-DOT-something as a website, an ISP, or an email address, which is reasonably correct.
In technical terms, a domain name consists of one or more labels delimited by periods (or dots), such as example.com. The rightmost label is the top-level domain. For example, the com in www.example.com is the top-level domain. There are many top-level domains other than com. Each label to the left of a dot is a subdomain of the domain to the right. In other words, example.com is a subdomain of com and www.example.com is a subdomain of example.com.
A hostname is a domain name that has at least one associated IP address. For example, the domain names www.example.com and example.com can ber hostnames but the top-level com domain cannot. Other top-level domains, however, particularly country code top-level domains, can have an IP address, and if so, they are also hostnames.
Having a domain name is a very important part of your online presence if you're a business or organization but any person or group can have a domain name. It's very easy to register a domain name that isn't already in use. The cost is whatever a particular domain name registrar determines it to be.
You can use a domain name as your email address. Go to the next tab for more information.
You can direct visitors to specific areas of your website using subdomain names. For example, if you have registered the domain name mydomain.com, you can have xxx.subdomain.com and yyy.subdomain.com point to different parts of your site.
If you have a registered domain name you can use it as an email address as well as a website address. For example, you can have email@example.com, firstname.lastname@example.org, and so forth, each of which directs incoming email to a server of your choice.
It takes about 24-48 hours for a new email address to propagate across the world.
Websites for Humans cannot guarantee that any particularemail service provider or email client application is compatible with your website's ability to send email. There are many quirky ones.