In web design, a domain is the unique name that identifies a website on the internet. It’s what users type into their browser to visit a specific site, like yourbusiness.com. Every domain name maps to an IP address, but instead of remembering a string of numbers, visitors can just use the easy-to-remember domain.

Think of a domain like your digital street address — it tells people (and search engines) where to find your website. Without one, you’d have no recognizable presence online. Domains are part of a larger system known as DNS (Domain Name System), which helps route internet traffic to the right place.

Why domains matter for your website

Your domain affects everything from branding to how easily people can find you online. It often matches your business name, helping with credibility and trust. And when used with an AI website builder, getting a domain up and running can be fast and simple.

Plus, having your own domain makes it easier to integrate with tools like email marketing, online scheduling, and other important features for managing your web presence and client engagement.

Types of domains

Domains come in a few forms. Here are the most common:

• Top-Level Domains (TLDs): These are the endings like .com, .org, .net, etc.
• Second-Level Domains: The main name of your site, like yourbusiness in yourbusiness.com.
• Subdomains: These are custom prefixes before the main domain, such as blog.yourbusiness.com.

How to get a domain

You purchase and register a domain through a domain registrar like GoDaddy, Namecheap, or Google Domains. Some AI website builders also offer domain registration as part of their setup process.

After registering, you connect your domain to your website — which is often done automatically if you're using tools like B12's AI Assist to help with content creation, SEO optimization, or even drafting email campaigns.

FAQs about domain in web design

What’s the difference between a domain and a URL?

A domain is just the name (like b12.io), while a URL includes the entire web address including https://, the domain, and the path to a specific page.

Can I change my domain later?

Yes, but it’s best to choose one you can stick with. Changing domains may impact your SEO and traffic if not done carefully.

Do I need a domain to build a website?

Technically no — you can use a subdomain from a website builder (like yourname.sitebuilder.com). But if you want a professional presence, having your own domain is highly recommended.

How long does a domain last?

Domains are typically registered in yearly increments. You can renew them annually or set up auto-renewal to keep them active.

Is a domain the same as hosting?

No. A domain is your website’s name; hosting is the server space where your site’s files live. You need both for a functioning website.

Building trust and visibility with the right domain

Choosing a domain is one of the first — and most important — steps in web design. It helps establish your brand, improves visibility, and lays the groundwork for your online presence. Whether you're starting from scratch or rebranding, securing a domain that matches your goals can make a lasting impact. And with tools like B12 and its AI website builder, it's easier than ever to get started.

Get started with your own professional website and custom domain today.