Robots.txt for Beginners: What It Does and How to Use It

If you manage a website, you may have seen a file called robots.txt and wondered whether you need one. It is a small text file that gives search engine crawlers instructions about which parts of your site they may access.

The file can be useful, but a wrong rule can stop crawlers from visiting pages you want people to find. This guide explains the basics and shows what to check before making changes.

What is a robots.txt file?

A robots.txt file sits at the root of a website. For example, a site at https://example.com/ would place the file at https://example.com/robots.txt.

When a crawler visits, it can read the file to find rules that apply to it. Website owners commonly use these rules to reduce crawling of sections that are unimportant to search results, such as certain internal or duplicate URLs.

A robots.txt file manages crawling. It is not a reliable way to keep a page out of search results: a blocked URL may still be discovered through links elsewhere. Google recommends using an appropriate noindex method or access protection when the goal is to prevent a page from appearing in its results.

Understanding the basic rules

A simple robots.txt file might look like this:

User-agent: *
Disallow: /internal-search/
Sitemap: https://example.com/sitemap.xml

Here is what each line means:

• User-agent: * applies the following rule to all crawlers that follow the robots.txt convention.

• Disallow: /internal-search/ asks those crawlers not to access URLs under that path.

• Sitemap: points to a sitemap URL. Use the real, complete URL of your own sitemap.

The example path and domain are placeholders. Do not publish this example unchanged. Your site may not have an /internal-search/ directory, and its sitemap may use a different address.

Do you need to block anything?

Before adding a Disallow rule, ask why you need it. Many small websites do not need a complicated robots.txt file. Adding rules without a clear purpose can create more problems than it solves.

Start by identifying pages that visitors should find through search, such as articles, product pages, or service pages. Make sure your proposed rules do not block those pages or resources needed to display them.

Be especially careful with a rule such as Disallow: /. Applied to all crawlers, it asks them not to crawl the entire site. That might be intentional for a private development site, but it is usually a serious mistake on a public website.

Robots.txt is not a privacy feature

A robots.txt file is publicly accessible. Anyone can open it in a browser and see the paths listed inside it. Do not list a private area in the file and assume it has become secure.

If information should be available only to authorized people, protect it with proper access controls. If your concern is whether a public page appears in Google Search, review the relevant indexing controls instead of assuming a crawl block will solve it.

How to prepare and check your file

A robots.txt generator can make it easier to write the initial file. Before adding the result to your website, follow these steps:

1. Check the domain. Confirm that any sitemap URL uses your actual domain and the correct https:// address.

2. Review every blocked path. Make sure each directory exists and that you genuinely want to limit crawling there.

3. Look for broad rules. A short rule can affect many URLs. Pay particular attention to rules containing /.

4. Publish the file in the correct location. It belongs at the root of the site, where visitors can open /robots.txt.

5. Open the published file. Confirm that it displays the rules you intended, with no leftover example domain or unexpected lines.

Google’s documentation explains the file location, rule format, and sitemap line in more detail.

Revisit it when your website changes

A rule that made sense when your site launched may become a problem later. For example, you might publish new pages inside a directory that was previously blocked. Review your robots.txt file when you change your site structure, move content, or launch a new section.

If an important page is missing from search results, robots.txt is one thing to check, but it is only one possible cause. Confirm that the page works, can be reached through links, and does not carry an unintended indexing restriction.

Keep it simple

The best robots.txt file is one you understand. Start with a clear reason for each rule, check the paths before publishing, and revisit the file as your site grows.

TempoDay’s Robots.txt Generator can help you prepare a draft. Treat its output as a configuration to review for your website, then check the published file to make sure it says exactly what you intended.