A robots.txt file is a text file that tells search engine crawlers which parts of a website they should or should not crawl. Website owners use it to manage crawler access to specific pages, folders, and URL patterns.
For Bing SEO, robots.txt is important because it helps guide Bingbot’s crawling activity. Incorrect rules can accidentally prevent Bing from accessing important pages.
In this guide, you’ll learn how robots.txt works, how to write its rules, and how to check them safely.
1. What Is a Robots.txt File?
Robots.txt uses the Robots Exclusion Protocol, a standard for communicating crawling instructions to compatible bots.
A website’s robots.txt file is normally located in its root directory. For example:
https://example.com/robots.txt
When Bingbot visits a website, it checks the applicable robots.txt instructions to understand which URL paths it may crawl. Bing confirms that Bingbot respects applicable directives, including crawl-delay settings.
Think of robots.txt as a set of crawling guidelines for search engine bots, rather than a security system.
2. Why Is Robots.txt Important for Bing SEO?
A properly configured robots.txt file can help you:
- Prevent crawling of unnecessary website sections.
- Reduce crawling of certain duplicate or low-value URL patterns.
- Keep crawlers away from internal application paths that don’t need crawling.
- Provide the location of your XML sitemap.
- Avoid wasting crawling resources on unimportant URLs.
However, blocking a URL does not guarantee that Bing will remove it from its index. Robots.txt controls crawling, not indexing.
3. How Does Robots.txt Work?
Robots.txt uses directives to tell crawlers which URL paths to allow or disallow.
The two most important directives are:
User-agent: identifies the crawler receiving the instructions.Disallow: tells that crawler not to crawl matching URL paths.
The Allow directive can create exceptions within a disallowed path. Bing documents these directives in its robots.txt creation guide.
Example: A basic robots.txt file
User-agent: *
Disallow: /private/
Sitemap: https://example.com/sitemap.xmlHere’s what each line means:
| Directive | Meaning |
|---|---|
User-agent: * | Applies the following rules to all compliant crawlers |
Disallow: /private/ | Requests that crawlers don’t crawl URLs under /private/ |
Sitemap: | Provides the location of the XML sitemap |
For example, this rule targets URLs such as /private/account/ and /private/files/. It does not block unrelated paths like /blog/.
4. How Can You Give Instructions Specifically to Bingbot?
If you want a rule to apply specifically to Bingbot, identify it by name.
For example:
User-agent: Bingbot
Disallow: /temporary/
Disallow: /internal-search/This instructs Bingbot not to crawl URLs matching those paths.
Important: When Bingbot finds a specific section for itself, it ignores the generic section’s directives. Therefore, repeat any general rules you still want Bingbot to follow. Bing warns that separate bot-specific sections can make robots.txt harder to maintain.
For most websites, a simple shared rule set is easier to manage.
5. Common Robots.txt Examples for SEO Beginners
Example A: Block a folder
User-agent: *
Disallow: /temp/Use when compatible crawlers should avoid crawling URLs within a temporary directory.
Example B: Block the entire website
User-agent: *
Disallow: /This broadly disallows crawling across the website. Do not use this on a live website that needs search visibility.
Example C: Allow the website to be crawled
User-agent: *
Disallow:This contains no disallowed path, so it does not restrict crawling through this rule set.
Example D: Block a folder but allow one file
User-agent: Bingbot
Disallow: /resources/
Allow: /resources/public-guide.htmlThe specific guide is an exception to the broader folder rule, subject to robots.txt matching rules.
6. Can Robots.txt Prevent a Page From Appearing in Bing?
This is one of the most important distinctions in technical SEO.
Robots.txt controls crawling; noindex tells Bing not to include a page in its index.
Suppose you have a page you don’t want appearing in search results.
You might use this HTML directive:
<meta name="robots" content="noindex">For Bing to see that instruction, Bingbot must be allowed to crawl the page. If robots.txt blocks it, Bing may not be able to read the noindex directive.
If a page contains confidential information, don’t rely on either directive for security. Use authentication or server-side access controls.
7. How Do You Create and Upload a Robots.txt File?
Follow these basic steps:
- Identify the paths you want to control. Review your site structure and decide which URLs genuinely need crawling.
- Create a plain-text file. Use a text editor and save it as
robots.txt. - Add the appropriate directives. Use
User-agent,Disallow, and, where needed,Allow. - Add your sitemap location. Include a
Sitemap:line if you have an XML sitemap. - Upload the file to your website’s root directory. Check that it is accessible at
https://example.com/robots.txt. - Test the rules before relying on them. Check important URLs to ensure they aren’t accidentally blocked.
These steps follow Bing’s published guidance for creating and deploying robots.txt.
8. How Can You Test Robots.txt for Bingbot?
Bing Webmaster Tools offers a Robots.txt Tester to check whether a URL is allowed or disallowed by the rules. You can select Bingbot, test a URL, and identify the directive affecting it.
You can open the tool here: Bing Webmaster Tools — Robots.txt Tester.
Before publishing changes, check these items:
- Are important blog posts crawlable?
- Are product and service pages accessible?
- Are any valuable directories accidentally disallowed?
- Does the sitemap URL work?
- Do the rules behave as intended for Bingbot?
A small mistake can block crawling across a large part of your website.
9. Common Robots.txt Mistakes to Avoid
| Mistake | Why it matters |
|---|---|
| Blocking the entire site unintentionally | Can prevent Bingbot from crawling important pages |
Blocking pages that need a noindex directive read | Bingbot may not see the directive |
| Treating robots.txt as password protection | It does not secure private content |
| Forgetting bot-specific rule behavior | Bingbot may ignore directives in the generic section when a specific section applies |
| Failing to test changes | Important URLs may become inaccessible to crawlers |
Bing recommends allowing efficient crawling and avoiding unnecessary restrictions on important URLs.
Final Takeaway
A robots.txt file provides crawling instructions to Bingbot and other compatible crawlers. It helps website owners manage which URL paths crawlers should access.
Remember these three principles:
User-agentidentifies the crawler.DisallowandAllowcontrol crawling access to URL paths.noindexcontrols whether a page should appear in the search index.
For your Bing SEO learning journey, the next useful topic is how to use meta robots tags and the noindex directive to control whether pages appear in Bing search results.