How to Write a Robots.txt File…It's an Art - Kern Media

Dec 26, 2021
Web Development

Welcome to Indigo Local Marketing's comprehensive guide on how to write a robots.txt file. In the vast world of digital marketing, optimizing your website's search engine performance is crucial. By creating a well-crafted robots.txt file, you can effectively communicate with search engine crawlers and influence how your website is indexed and ranked. Let's dive into the details and master the art of writing a robots.txt file!

The Importance of Robots.txt

A robots.txt file serves as a set of guidelines for search engine crawlers, informing them which pages or areas of your website should or should not be accessed. It is a powerful tool that can prevent certain pages from appearing in search engine results, protect sensitive information, and optimize crawl budget allocation. By properly configuring your robots.txt file, you can ensure search engines index the most relevant and important content on your website.

Understanding the Structure

A robots.txt file follows a specific structure and consists of two main directives: User-agent and Disallow. The User-agent directive indicates which search engine crawler the directive applies to, and the Disallow directive specifies the pages or directories that should not be crawled.

For example, to prevent all search engine crawlers from accessing a specific directory called "/private-folder/", you would use the following directive:

User-agent: * Disallow: /private-folder/

Using Wildcards and Multiple Directives

Wildcards can be used to apply directives to multiple URLs. The asterisk (*) can be used as a wildcard character to match any sequence of characters. You can also use multiple directives to set different rules for different search engine crawlers.

For instance, to disallow a directory called "/archive/" from being crawled by Googlebot, but allow other search engine crawlers to access it, you would use the following directives:

User-agent: Googlebot Disallow: /archive/ User-agent: * Disallow:

Best Practices for Writing Robots.txt File

To ensure your robots.txt file functions optimally, keep the following best practices in mind:

1. Use an Informative Comment

Begin your robots.txt file with a comment to provide a descriptive overview of its purpose and any important instructions. This helps other developers understand your intentions and makes future modifications easier.

2. Include an Sitemap

Include a link to your website's XML sitemap in the robots.txt file. This provides search engine crawlers with a clear path to discover and index your website's pages efficiently.

3. Utilize Crawl Delay

If your website receives significant traffic or has a large number of pages, using the "Crawl Delay" directive can prevent overloading your server. This directive informs search engine crawlers to wait a specified number of seconds between requests, giving your server ample time to handle the traffic.

4. Regularly Review and Update

Regularly review your robots.txt file to ensure it remains accurate and up-to-date. As your website evolves, pages may be added or removed, and it's important to reflect those changes in your file to avoid unintended consequences.

5. Test with Robots.txt Tester

Before deploying any updates or changes to your robots.txt file, make use of the Google Search Console's "Robots.txt Tester" tool. This tool allows you to simulate how Googlebot will crawl and interpret your file, helping you identify any potential issues before they impact search rankings.


Writing a robots.txt file may seem like a technical process, but with a clear understanding of its structure and best practices, you can optimize your website's search engine performance effectively. Remember to configure your robots.txt file correctly, regularly review and update it, and utilize testing tools to ensure it aligns with your website's goals and objectives. At Indigo Local Marketing, we specialize in offering professional digital marketing services, including search engine optimization techniques such as robots.txt file optimization. Contact us today to learn more about how we can help your business thrive in the digital world!

Guida Michele
This guide on writing a robots.txt file is informative and helpful. It's essential in optimizing search engine performance and influencing website indexing and ranking. A must-read for digital marketers!
Nov 10, 2023