{"id":676,"date":"2026-10-26T03:49:47","date_gmt":"2026-10-26T03:49:47","guid":{"rendered":"https:\/\/sitefitters.com\/learn\/glossary\/subdomain\/"},"modified":"2026-10-26T03:49:47","modified_gmt":"2026-10-26T03:49:47","slug":"subdomain","status":"publish","type":"page","link":"https:\/\/sitefitters.com\/fr\/learn\/glossary\/subdomain\/","title":{"rendered":"Subdomain"},"content":{"rendered":"
Learn<\/a> \/ Glossary<\/a> \/ Domains & DNS<\/a><\/div>

Subdomain Explained.<\/em><\/h1>
In one sentence<\/small>A subdomain is an extra section added in front of your main domain, like shop.yourbusiness.com, used to run a separate part of your website.<\/div><\/div><\/section>

What It Is<\/h2>

A subdomain is a prefix added to the front of your domain name, separated by a dot. In book.smithsalon.com, the word book is the subdomain. If your domain is a building, a subdomain is like a separate suite inside it with its own door. The familiar www in front of many addresses is technically a subdomain too.<\/p>

Why It Matters for Your Business<\/h2>

Subdomains let you run different tools under one brand without buying new domains. A salon might keep its main site at smithsalon.com, its online booking at book.smithsalon.com, and a customer portal at clients.smithsalon.com. Each one can live on a different service, yet customers still see a single, consistent address.<\/p>

Good to Know<\/h2>

Search engines can treat a subdomain somewhat like a separate site. If you want a blog to help your main site rank, many people prefer a folder like smithsalon.com\/blog over blog.smithsalon.com. Subdomains are usually free to create in your DNS settings. Your host or DNS provider can add them in a few minutes.<\/p>

Related terms<\/h4>
Domain name<\/a>DNS record<\/a>CNAME record<\/a>URL<\/a><\/div><\/div>