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Subdomains vs. Subdirectories: Understanding Their Role in SEO



Subdomains vs. Subdirectories: Understanding Their Role in SEO

In the world of SEO, the structure of your website plays a critical role in its search engine performance. One common question among website owners and SEO professionals is the difference between subdomains and subdirectories, and how they impact SEO. This article will delve into what subdomains and subdirectories are, how to create them, their SEO implications, and Google's recommendations.

What Is a Subdomain?

A subdomain is an additional part of your main domain name. It is created to organize and navigate to different sections of your website. For example, if your main domain is "," a subdomain could be ""



How to Create a Subdomain?

  1. Access Your Hosting Account: Log in to your web hosting account.
  2. Find the Subdomains Section: Navigate to the section in your control panel that handles subdomains.
  3. Create the Subdomain: Enter the name of the subdomain you want to create (e.g., "docs") and link it to the desired directory on your server.
  4. Configure DNS Settings: Ensure your DNS settings are updated to reflect the new subdomain.

What Is a Subdirectory?

A subdirectory, also known as a subfolder, is a division within your main domain. It appears as a folder within your website’s structure, such as ""

How to Create a Subdirectory?

  1. Access Your File Manager: Log in to your web hosting account and access the file manager.
  2. Create a New Folder: Within the public_html (or equivalent) directory, create a new folder with the desired name (e.g., "adsense").
  3. Upload Content: Add your content to this folder to make it accessible via the new subdirectory.

Subdomain vs. Subdirectory for SEO

Choosing between a subdomain and a subdirectory depends on various factors, including your SEO strategy, the type of content, and how you want search engines to treat your content.


  • Advantages: Allows for clear separation of different content types or functions. Ideal for distinct sections like blogs, forums, or e-commerce sites.
  • Disadvantages: Search engines may treat subdomains as separate entities, potentially diluting your SEO efforts across multiple sites.


  • Advantages: Easier to manage and maintain a unified authority. Helps in consolidating SEO efforts under one domain.
  • Disadvantages: Can become unwieldy if not properly organized, especially for large sites with diverse content.

What Does Google Recommend?

Google has stated that their algorithms can handle both subdomains and subdirectories well. The key is to choose the structure that best suits your content and business goals. Historically, Google has indicated a slight preference for subdirectories due to the unified domain authority, but subdomains are equally viable if implemented correctly.

When to Choose a Subdomain Over a Subdirectory

  1. Distinct Content Types: If you have significantly different content types, such as an e-commerce store and a blog, a subdomain can help differentiate and organize your site.
  2. Targeting Different Audiences: When you want to target different audiences or regions separately, subdomains can be beneficial.
  3. Technical Requirements: Some web applications or content management systems may require a subdomain for technical reasons.

Is It OK to Use a Subdomain for a Mobile Version of a Website?

Yes, it is acceptable to use a subdomain for a mobile version of your website (e.g., ""). However, with the rise of responsive web design, this practice is becoming less common. Responsive design, which adapts the same URL to different devices, is generally preferred for maintaining SEO benefits and providing a consistent user experience.


Q1: Can subdomains negatively impact SEO?

A1: Subdomains can impact SEO if not handled properly. They are treated as separate sites, which may dilute authority. However, with proper management and linking, they can perform well.

Q2: Are subdirectories always better for SEO?

A2: Not necessarily. Subdirectories can benefit from the main domain's authority, but they must be well-organized to avoid issues with site structure and usability.

Q3: How does Google index subdomains compared to subdirectories?

A3: Google indexes both similarly, but subdomains are treated as separate sites. Proper linking and sitemap submission can help with indexing.

Q4: Should I use subdomains or subdirectories for international SEO?

A4: For international SEO, subdomains can help target specific regions, but subdirectories with hreflang tags are also effective.

Q5: Can I move from a subdomain to a subdirectory later?

A5: Yes, but it requires careful planning and implementation to avoid SEO penalties and loss of traffic. Redirects and updates to internal links are essential.


Choosing between subdomains and subdirectories depends on your specific needs and goals. Both have their advantages and can be optimized for SEO effectively. Understanding their roles and how to implement them properly can significantly enhance your website's performance and search engine rankings.

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