GEO Audit Checklist: 15 Things Marketing Teams Must Check in 2026

By William Wang, Founder of GEOScore AI Your website might rank #1 on Google and still be invisible to ChatGPT, Perplexity, and Claude. That is the reality of 2026 — traditional SEO and Generative Engine Optimization (GEO) are two different disciplines, and you need both. This checklist covers the 15 critical items every marketing team should audit to ensure their website is visible to AI search engines. The Checklist 1. AI Crawler Access (robots.txt) Check : Does your robots.txt allow GPTBot, ClaudeBot, PerplexityBot, and Google-Extended? Many sites block AI crawlers by default. Open your robots.txt and look for Disallow rules targeting these user agents. If they are blocked, AI search engines literally cannot see your content. Fix : Add explicit Allow directives for each AI crawler. 2. llms.txt File Check : Does yoursite.com/llms.txt exist and return valid content? This emerging standard helps AI systems understand your site structure quickly. Sites with llms.txt get categorized more