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A Subdomain is a separate section or branch of a website that functions independently from the main domain. Subdomains are often used to organize content based on different topics, geographical locations, or languages, and are identified by a prefix before the main domain name.

For example, if the main domain is, a subdomain could be This allows the main website and subdomain to be treated as separate entities, which can be beneficial for organizing content, managing user access, and even for SEO purposes.

It’s essential to understand that subdomains are considered separate websites by search engines. This means they have their own crawl budget and ranking signals, and they need to be optimized separately for SEO. However, a well-structured subdomain can boost the overall authority of the main domain.

Here are some helpful resources for understanding subdomains:

  1. What is a subdomain?
  2. Subdomain vs. Subdirectory: What’s the Difference?
  3. How Subdomains Affect SEO