Subdomains: Definition, Examples, and Setup

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Subdomains are an essential part of a website’s structure that can help with organization and user experience. In this article, we’ll define subdomains, provide examples of how they are used, and offer step-by-step instructions for setting them up.

What is a Subdomain?

A subdomain is a domain that is part of a larger domain. For example, in “,” “blog” is a subdomain of “” Subdomains are created by adding a prefix to the domain name and separating it with a dot.

Subdomains differ from main domains in that they are a subdivision of a larger domain. They have their own unique DNS records and can be used to create separate websites or sections of a website.

Why Use a Subdomain?

There are several benefits to using a subdomain, including:

  • Improved organization: Subdomains can be used to separate different sections of a website for better organization and easier navigation.
  • Better user experience: Subdomains can improve the user experience by making it easier for visitors to find the content they’re looking for.
  • SEO benefits: Subdomains can help with SEO by providing a way to target specific keywords or topics.

Types of Subdomains

There are different types of subdomains, including:

  • Wildcard subdomains: A wildcard subdomain is a subdomain that can be used to create any number of subdomains on the fly.
  • Third-level subdomains: A third-level subdomain is a subdomain that is created by adding a third level to the domain name, such as “”

Each type of subdomain has its own unique use cases and benefits.

How to Set Up a Subdomain

Setting up a subdomain involves creating DNS records and configuring hosting settings. Here are the steps to set up a subdomain:

  1. Choose a subdomain name
  2. Create a new DNS record for the subdomain
  3. Configure hosting settings for the subdomain
  4. Test the subdomain to ensure it’s working correctly

It’s important to follow best practices when setting up a subdomain to ensure it’s secure and reliable.

Examples of Subdomains

Subdomains are used by many websites and businesses to create separate sections for specific topics or services. Here are a few examples of subdomains in use:

  • “” for a company blog
  • “” for an e-commerce store
  • “” for a discussion forum

Each of these subdomains allows the website or business to separate different types of content or services and provide a better user experience.


Subdomains can be a powerful tool for organizing content, improving the user experience, and targeting specific keywords or topics for SEO. By following the steps outlined in this article, you can set up a subdomain and start reaping the benefits for your website or business.

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