A robots.txt file allows you to control which files search engine crawlers can access on your website. This simple yet powerful tool is essential for managing how search engines interact with your site. In this guide, we'll walk you through the process of creating, implementing, and submitting a robots.txt file.
A robots.txt file is a plain text file that resides at the root of your website. For example, for the site www.example.com, the robots.txt file would be located at www.example.com/robots.txt. This file follows the Robots Exclusion Protocol and contains one or more rules. Each rule specifies whether all crawlers or a specific crawler is allowed or disallowed from accessing a specific file or directory on your domain or subdomain.
Here's a simple robots.txt file with two rules:
User-agent: Googlebot
Disallow: /nogooglebot/
User-agent: *
Allow: /
Sitemap: https://www.example.com/sitemap.xml
This robots.txt file means:
To create and ensure general accessibility and proper functioning of a robots.txt file, follow these four steps:
You can use almost any text editor to create a robots.txt file, such as Notepad, TextEdit, vi, or emacs. Avoid using word processors as they often save files in proprietary formats and may add unexpected characters. When prompted, be sure to save the file using UTF-8 encoding.
Rules tell crawlers which sections of your site they can crawl. Here are some guidelines for adding rules to your robots.txt file:
Google's crawlers accept the following rules in robots.txt files:
Once you've saved the robots.txt file on your computer, you need to make it available to search engine crawlers. The process for uploading the file depends on your website's architecture and server. Contact your web hosting provider or consult their documentation for specific instructions.
After uploading the robots.txt file, verify that it's publicly accessible and that Google can parse it. You can do this by:
Once you've uploaded and tested your robots.txt file, Google's crawlers will automatically find and start using your robots.txt file. No action is required on your part. If you've updated your robots.txt file and need to refresh Google's cached copy quickly, you can learn how to submit an updated robots.txt file.
Here are some common useful robots.txt rules:
User-agent: *
Disallow: /
User-agent: *
Disallow: /calendar/
Disallow: /junk/
User-agent: Googlebot-news
Allow: /
User-agent: *
Disallow: /
User-agent: Googlebot-Image
Disallow: /images/dogs.jpg
User-agent: Googlebot-Image
Disallow: /
User-agent: Googlebot
Disallow: /*.gif$
Remember, while robots.txt is a powerful tool for managing crawler access, it should not be used to block access to private content. Instead, use appropriate authentication methods for sensitive information.
By following this guide, you'll be well-equipped to create, implement, and manage your website's robots.txt file, ensuring better control over how search engines interact with your site.