Reading a robots.txt file is straightforward: type the domain name followed by /robots.txt into your browser's address bar. For example, ottawaseo.com/robots.txt shows our own directives. The file appears as plain text with simple commands that tell search engine bots which parts of the site they can or cannot crawl. The basic syntax has two key elements. "User-agent" specifies which bot the rule applies to (like Googlebot, Bingbot, or * for all bots). "Disallow" blocks access to specific paths, while "Allow" explicitly permits them. A line like "Disallow: /admin/" tells all bots to skip the admin directory. A blank Disallow line means everything is crawlable. Most robots.txt files also include a Sitemap directive pointing to the XML sitemap location, which helps search engines discover your pages more efficiently. You might see "Crawl-delay" directives for specific bots, though Google ignores this command. When auditing a site's robots.txt, check for common mistakes: accidentally blocking important pages (like disallowing /wp-content/ which blocks CSS and JavaScript), blocking search engines entirely with "Disallow: /", or having conflicting rules. At Ottawa SEO, we regularly see sites blocking their staging environment properly but forgetting to update robots.txt when launching, leaving the entire production site unindexable. The order matters too. Bots typically follow the most specific rule that matches. If you have "Disallow: /product/" and "Allow: /product/special-item", the Allow usually takes precedence for that specific path, though bot behavior varies slightly. For deeper analysis beyond reading the raw file, use Google Search Console's robots.txt Tester tool. It shows exactly how Googlebot interprets your file and lets you test specific URLs against your rules. This catches syntax errors that aren't obvious when reading the plain text. Remember that robots.txt is a request, not a firewall—it doesn't prevent determined bots from accessing content, just asks compliant crawlers to respect your boundaries.