SEO

What is Robots.txt?

A robots.txt file is a plain text file at the root of your website that instructs web crawlers which pages or sections they are and are not allowed to access.

Definition

A robots.txt file is a plain text file at the root of your website that instructs web crawlers, including Googlebot and AI crawlers, which pages or sections of your site they are and are not allowed to access. It is a standard part of web infrastructure and one of the first things any crawler looks for when visiting your site. Used correctly, it prevents crawlers from wasting time on admin pages, duplicate content, and other areas that should not be indexed.

Why It Matters for Small Businesses

A misconfigured robots.txt is one of the most damaging and easily overlooked SEO errors a website can have. A common mistake during website migrations is accidentally leaving a block all crawlers setting in place from the development phase, which causes the entire site to disappear from search results. This is also the file you use to control which AI crawlers can access your content.

Example

A retail brand launches a redesigned website after a development phase where all crawlers were blocked for privacy. The developer forgets to update the robots.txt file post-launch. For three weeks Google is blocked from crawling the site and rankings drop sharply. A simple robots.txt review before launch would have prevented it entirely.

Related Terms

Crawl BudgetRobots.txt is the primary tool for directing crawl budget

XML SitemapWorks alongside robots.txt as part of technical site management

AI CrawlersRobots.txt can be used to control AI crawler access specifically

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