Understanding the Precision of Robots.txt Rules

robotstxt rules

The management of how search engines interact with your website is crucial. A fundamental tool in this domain is the robots.txt file, which guides search engine bots on what parts of your site they can or cannot crawl. Chris Long, VP of Marketing at Go Fish Digital, recently shared valuable insights on the intricacies of setting up robots.txt rules, emphasizing the importance of specificity in these commands.

The Hierarchy of Rules in Robots.txt

The robots.txt file operates on a principle of specificity, where the most precise rule concerning a particular path takes precedence over less specific ones. This functionality is vital for SEO professionals who need to fine-tune the access given to different search engine bots.

Example Scenario:

Consider a website with the following two directives in its robots.txt:

  1. Disallow: /blog/ – This command blocks all search engine bots from crawling any part of the blog section of the site.
  2. Allow: /blog/shopify-speed-optimizations/ – Conversely, this rule specifically allows bots to crawl the “Shopify Speed Optimizations” post within the blog.

In this case, despite the general disallowance of the entire blog directory, the more specific Allow directive for the “Shopify Speed Optimizations” post takes precedence. As a result, search engines will crawl this particular page while continuing to block the rest of the blog section.

User-Agent Specific Directives:

The specificity rule also applies when differentiating between various user-agents (the specific bots from different search engines):

  1. A general directive that blocks all user-agents from crawling the blog.
  2. A specific directive allowing only Googlebot to crawl the blog.

Outcome: Only Googlebot will have the permission to access the blog content, while other bots will respect the broader disallow directive.

Strategic Use of Specificity:

The nuances of robots.txt directives can be leveraged to optimize your site’s SEO by controlling bot traffic to enhance site performance and focus crawling on high-value pages. It is essential to structure robots.txt rules to not only prevent search engines from accessing sensitive or irrelevant sections of the site but also to explicitly guide them towards content that you want to be indexed and ranked.


The example shared by Chris Long underscores a critical aspect of SEO management—understanding and implementing the most effective robots.txt rules can significantly influence how your site is perceived by search engines. By strategically using Allow and Disallow commands, you can create a tailored crawling blueprint that aligns with your SEO goals, ensuring that search engines index your content correctly and efficiently.

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