Subdomains or Subdirectories Which Is Better for SEO?

Subdomains or Subdirectories Which Is Better for SEO?

Steven Baron

Quick Answer

Choosing between subdomains and subdirectories for SEO comes down to your specific needs. Google’s John Mueller has stated that there’s no significant ranking difference between the two, suggesting that both can be effective for SEO when managed correctly. While subdirectories might be simpler to manage and traditionally believed to benefit more from a site’s overall backlink profile, subdomains offer flexibility for internationalization, testing, and distinct website sections. The key is proper optimization and internal linking, making either option viable based on your operational requirements rather than SEO alone.

What Is a Subdomain?


A subdomain functions as a distinct extension of your primary domain name, designed with a specific purpose in mind, effectively acting as a separate website under the same main domain umbrella. This versatile feature allows for the organization and segmentation of content based on its nature or intended audience, enhancing both the user experience and website management.

For instance, a business may opt to create a subdomain such as to specifically cater to their blogging content. This separation enables a dedicated space for readers to engage with articles, updates, and news, distinct from the main website’s commercial or informational focus. Similarly, an e-commerce business might establish a subdomain like to house its online store. This strategic separation allows for a tailored design, user interface, and functionality that is optimized for shopping, distinct from the main site’s layout and purpose.

The use of subdomains is a prevalent practice across the web, given their utility in organizing content and providing targeted user experiences. Each subdomain can possess its unique content, design, and navigation structure, making it an effective tool for businesses to diversify their online presence without needing a completely new website.

Identifying whether a website utilizes subdomains can be accomplished through tools like Semrush’s or Ahref’s Site Audit. By crawling a website, users can analyze its structure and identify the presence of any subdomains, gaining insights into how a site is organized and potentially uncovering new areas for optimization or content development. This level of analysis is invaluable for webmasters looking to refine their site architecture and enhance the effectiveness of their online presence.

What Is a Subdirectory?


A subdirectory, also known as a subfolder, is an integral part of a website’s structure, residing within the main domain. It operates under the umbrella of the primary domain name, offering a method to neatly categorize and compartmentalize website content into various sections or themes. This organizational tool is key to creating a coherent and user-friendly website navigation system.

Creating subdirectories, such as for hosting blog content, is a straightforward approach to structuring your website. This method allows for the segregation of different content types, such as blogs, product pages, or support sections, each within its dedicated subdirectory. This not only aids in maintaining an organized site but also enhances the user experience by making information easily accessible and logically arranged.

Moreover, the impact of subdirectories on Search Engine Optimization (SEO) is a point of discussion among webmasters and SEO specialists. Unlike subdomains, which are often seen by search engines as separate entities, subdirectories are directly associated with the main domain. This means that all the SEO efforts and the accumulated authority of the main domain can positively influence the content within its subdirectories. As such, using subdirectories can be a strategic choice for content that benefits from the main domain’s established SEO value.

Identifying the subdirectories in use on a website can be accomplished through tools like the Site Audit tool, which crawls the website and provides a comprehensive overview under the “Site Structure” section. This insight into the website’s architecture not only helps in understanding how content is organized but also in identifying potential areas for SEO and usability improvements.

In summary, subdirectories play a crucial role in website organization and SEO strategy. They offer a way to logically group content under the main domain, benefiting from the domain’s authority and helping in the overall SEO efforts. As webmasters continue to navigate the complexities of SEO, understanding and utilizing subdirectories effectively remains a key factor in developing a successful online presence.

Why use Subdomain and its benefits?


Using subdomains can offer strategic advantages in managing and optimizing a website’s structure for both user experience and SEO. Despite the challenge that a subdomain’s domain authority doesn’t automatically benefit from the primary domain’s authority—requiring dedicated SEO efforts—there are compelling reasons to employ subdomains under the right circumstances.

Reasons to Use Subdomains:

  1. Content Management: For businesses with extensive content that would be cumbersome to host on a single site, subdomains offer a neat solution to segregate and manage content efficiently.
  2. Campaigns and Partnerships: For large-scale campaigns or partnerships that demand distinct branding or separation from the main content, subdomains provide the necessary flexibility and independence.
  3. Tailored User Experiences: Subdomains allow for the creation of tailored user experiences, such as regional variations of a site or dedicated support platforms, offering content and services relevant to specific user segments.

When to Employ Subdomains:

  1. Support: Companies often separate customer support from their main site to streamline user experience and focus on support services, as seen with Google’s
  2. Regional Variations: For businesses serving multiple regions with distinct content needs, subdomains facilitate the creation of region-specific sites, enhancing local relevance and user experience.
  3. Blogs: A blog may warrant a subdomain if it’s expected to grow significantly, aiming to establish niche authority separate from the main website’s content.
  4. E-commerce Stores: Separating an e-commerce platform from the main site using a subdomain, like, allows for a distinct shopping experience with specialized design and functionality.
  5. Events: For companies hosting events, dedicating a subdomain to event information and registration can help focus user attention and streamline navigation.

Strategic Considerations:

  • SEO and Localization: Subdomains can be optimized individually for SEO and tailored for local markets, potentially improving search visibility and user engagement.
  • Design and Functionality: When a segment of a website requires a radically different design or functionality, a subdomain can ensure that these needs are met without compromising the coherence of the main site.
  • Testing Environments: Subdomains serve as ideal staging areas for testing website updates or new features, allowing for thorough evaluation before public release.

In conclusion, the decision to use subdomains should be driven by clear business needs and strategic considerations. Whether it’s for managing vast amounts of content, catering to different regional markets, hosting specific campaigns, or separating distinct functions of a website, subdomains offer a versatile tool for website organization and optimization. However, each subdomain requires dedicated management and SEO efforts to fully leverage its potential benefits.

Why use Subdirectories and its benefits?


Choosing to implement subdirectories in your website structure can be advantageous for several reasons, particularly when ease of management and consistent branding are key priorities. Here’s a deeper look into the benefits of using subdirectories and scenarios where they are particularly beneficial:

Benefits of Using Subdirectories:

  1. Ease of Management: Subdirectories offer a straightforward approach to website organization. Unlike subdomains, they do not require separate technical setups such as hosting accounts, SSL certificates, or distinct analytics tracking configurations. This simplification extends to content management, as subdirectories can be easily created, managed, and edited directly within the main website’s Content Management System (CMS), reducing the complexity and administrative overhead involved in website maintenance.
  2. Consistent Branding and User Experience: Employing subdirectories ensures that the branding and design elements remain consistent across different sections of your website. This consistency is crucial for maintaining a cohesive online presence, where each part of the site feels like an integral part of the whole, rather than a disjointed extension. Such a unified approach reinforces brand identity and contributes to a seamless user experience, as visitors navigate through different sections without encountering varying design themes that might confuse or detract from the sense of authenticity.

When to Use Subdirectories:

  1. For Simplified Website Setup and Maintenance: If the goal is to keep the website’s structure straightforward and manageable, subdirectories are the way to go. This approach is especially suitable for businesses with limited technical resources or those looking to minimize the complexity of their website’s architecture.
  2. To Uphold Brand Cohesion: When the continuity of the brand experience across the website is a priority, subdirectories serve as an effective solution. This is particularly relevant for organizations aiming to present a consistent brand narrative and visual identity throughout their online content, as seen in the example of the American Lung Association, which uses subdirectories to maintain a uniform look and feel across its site.
  3. Integrated SEO Benefits: From an SEO perspective, subdirectories can be advantageous because they inherit the domain authority of the main website, potentially boosting the visibility of the content housed within them. This is in contrast to subdomains, which are often treated as separate entities by search engines and may require additional efforts to build their own authority.

In summary, subdirectories are an excellent choice for businesses seeking a low-maintenance, cohesive, and SEO-friendly approach to organizing their website’s content. By opting for subdirectories, companies can ensure a consistent brand experience for their visitors while enjoying the benefits of a simplified website structure that leverages the established authority of their main domain.

Choosing Between Subdomains and Subdirectories: Navigating Structure for SEO Success


In conclusion, the debate between subdomains and subdirectories is nuanced, with the optimal choice hinging on the specific needs and structure of your website. If your site encompasses a broad array of distinct but critical content, subdomains can offer the necessary organizational framework to manage this diversity effectively. Conversely, for smaller websites with a more limited content range, subdirectories may provide a simpler, more streamlined approach to content management. Regardless of the path chosen, adhering to SEO best practices remains paramount to achieving your website’s objectives. This involves a dedicated effort towards keyword optimization, on-page SEO enhancements, backlink strategies, and steering clear of technical SEO pitfalls. Fortunately, tools like Semrush offer comprehensive support for these tasks, equipping website owners with the resources needed to optimize both subdomains and subdirectories effectively. By making informed decisions tailored to your site’s unique requirements and leveraging the right SEO tools, you can navigate the complexities of website structure to foster better organization, user experience, and search engine visibility.




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