A subdomain name is an addition to a domain name that can be used to highlight a specific page, department or service within a website. Subdomain names are often used to organize and categorize certain aspects of a website.

For example, if you have a website with the domain name “example.com”, you can use subdomain names to highlight specific parts of the website, such as “blog.example.com” for a blog, “support.example.com” for customer service or “store.example.com” for an online store.

Subdomain names can also be used to host several websites under a single domain name. For example, if you have a company with several departments, you can give each department its own subdomain, such as “sales.example.com”, “marketing.example.com” and “finance.example.com”.

In general, subdomain names give you more flexibility and control over the structure and organization of the website.