What Is Robots.txt?
Robots.txt is a plain-text file located at https://yoursite.com/robots.txt that provides crawl directives to web robots. Using the Robots Exclusion Protocol (REP), it specifies which user agents can access which URL paths. It supports Allow, Disallow, Crawl-delay, and Sitemap directives.
Why Robots.txt Matters for SEO
Robots.txt is your first line of crawl budget defense. It prevents search engines from wasting time on admin pages, internal search results, and non-indexable content. It is also the primary mechanism for blocking AI crawlers like GPTBot and ClaudeBot from scraping your content.
How to Use Robots.txt Effectively
Create rules that block low-value URL patterns while allowing access to all important content. Never block CSS, JavaScript, or image files that Googlebot needs for rendering. Test your rules using Google Search Console's robots.txt tester. Remember: robots.txt is advisory — it does not prevent indexing (use noindex for that).
📖 Related Article: The Ultimate robots.txt Guide — Read our in-depth guide for practical examples and advanced techniques.
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