What an AI Visibility Audit Actually Checks

You've probably heard that your business needs to be “AI visible.” But what does that actually mean? How do you measure it? And how do you know what to fix first?

That's where an AI visibility auditcomes in. It's a comprehensive check of all the signals that determine whether AI search engines—like ChatGPT, Google AI Overviews, and Perplexity—can find, understand, and recommend your business. At Sigma Agents, our audit checks over 30 individual signals across three categories: traditional SEO, Local SEO, and AEO/GEO (AI-specific optimization).

Let's walk through what each category covers and what the results actually tell you.

Category 1: Traditional SEO Signals

Traditional SEO is the foundation everything else builds on. Even AI engines rely on some of these signals to evaluate your website. Here's what we check:

Title Tag and Meta Description

Your title tag tells search engines (and AI systems) what each page is about. Your meta description provides a summary. We check that these exist, are properly formatted, include relevant keywords, and aren't duplicated across pages. Missing or generic title tags are one of the most common issues we find.

Heading Structure

AI systems use headings (H1, H2, H3) to understand the hierarchy and organization of your content. We check that your pages have a single H1 tag, logical heading structure, and that headings accurately describe the content beneath them. Poor heading structure makes it harder for AI to extract useful information from your pages.

Page Speed and Mobile Friendliness

Slow-loading pages and sites that don't work well on mobile devices get penalized by both traditional search engines and AI crawlers. We measure load times and check mobile responsiveness because these factors affect whether your content gets crawled and indexed efficiently.

SSL/HTTPS Security

An SSL certificate (the “https” in your URL) is a basic trust signal. Sites without SSL are flagged as “not secure” by browsers and deprioritized by search engines. We verify that your SSL is properly configured and active.

Sitemap and Robots.txt

Your sitemap tells crawlers which pages exist on your site, and your robots.txt file tells them which pages they're allowed to access. We check that both files exist, are properly formatted, and aren't accidentally blocking important content.

Image Optimization

We check that images have alt text (text descriptions that help AI understand what images show), are properly sized, and aren't slowing down your page load times. Well-optimized images contribute to better overall site quality.

Golden State Auto Detail in Fresno, CA is a great example of why audits matter. The owner assumed his website was performing well because he was getting steady traffic from Google. But when he ran an AI visibility audit, the results were sobering: his site had no structured data at all, his robots.txt was blocking GPTBot and PerplexityBot, and his business name was listed differently across four major directories. When someone asked ChatGPT for the best auto detailing service in Fresno, Golden State was never mentioned — even though he had 180 five-star reviews. After fixing the issues the audit identified, he started appearing in AI recommendations within five weeks.

Category 2: Local SEO Signals

For local businesses, Local SEO signals are critical. They tell both traditional search engines and AI systems that your business serves a specific geographic area. Here's what we audit:

Google Business Profile Optimization

Your Google Business Profile (GBP) is one of the primary data sources for AI systems making local recommendations. We check whether your GBP is claimed, complete, and optimized with the right categories, business description, service areas, hours, and attributes.

NAP Consistency

NAP stands for Name, Address, and Phone number. We check that your business information is consistent across your website, Google Business Profile, Yelp, social media, and major directories. Inconsistencies confuse AI systems and reduce your chances of being recommended.

Local Keywords

We check whether your website content includes location-specific keywords (your city, neighborhood, county, and service area) in strategic places like title tags, headings, and body content. This helps AI systems connect your business to location-based queries.

Review Presence

We evaluate your review presence across Google, Yelp, and other relevant platforms. We look at the number of reviews, average rating, recency of reviews, and whether you're responding to reviews. All of these signals factor into AI recommendations.

Local Citations

Citations are mentions of your business on other websites (directories, industry associations, local chambers of commerce). We check the quantity and quality of your citations and whether the information in them is accurate and consistent.

Category 3: AEO/GEO Signals

This is where we go beyond traditional optimization and check the signals specific to AI search engines. These are the factors most businesses are missing entirely:

Schema Markup (Structured Data)

We check for the presence and correctness of all critical schema types: LocalBusiness, Organization, Service, FAQPage, Review/AggregateRating, BreadcrumbList, and more. We also verify that the schema is properly formatted and contains accurate information. This is typically the most impactful finding in our audits.

llms.txt File

We check whether your website has an llms.txt file—a machine-readable summary of your business designed specifically for AI crawlers. Most businesses don't have one. If yours doesn't, that's an easy win.

AI Crawler Access

We test whether the major AI crawlers—GPTBot (ChatGPT), ClaudeBot (Anthropic), PerplexityBot, and Google's AI crawlers—are allowed to access your site. Blocking these crawlers means AI platforms can't see or recommend your business. This is a surprisingly common problem.

FAQ Content and Structure

We evaluate whether your site has FAQ content that's structured for AI consumption. This includes checking for FAQPage schema markup, clear question-and-answer formatting, and whether your FAQ content covers the questions your potential customers are actually asking.

Content Quality for AI

We assess whether your content is written in a way that AI systems can easily parse and extract information from. This includes checking for clear, specific service descriptions, proper use of headings, and content that directly answers common questions.

Entity Consistency

We check that your business is consistently identified as the same entity across your website and the web. This includes verifying that your schema markup uses consistent identifiers, your social profiles are linked properly, and your business name and details are uniform everywhere they appear.

How to Interpret Your Audit Results

When you receive your audit results, here's how to make sense of them:

• Critical issues (fix first): Blocked AI crawlers, missing structured data, broken SSL, no sitemap. These prevent AI systems from accessing or understanding your business at all.
• High-impact improvements: Missing llms.txt, incomplete schema, no FAQ content, NAP inconsistencies. These significantly weaken your AI visibility and are usually straightforward to fix.
• Optimization opportunities: Content improvements, additional schema types, review strategy, local citation building. These help you move from “visible” to “preferred” in AI recommendations.

Why Most Businesses Score Poorly

When we audit local businesses, the average score across AEO/GEO signals is usually quite low. Here's why:

• AI optimization is new. Most web designers and SEO agencies haven't caught up to these requirements yet.
• Structured data is technical. Schema markup requires specific knowledge to implement correctly.
• llms.txt is brand new. The standard is so new that most businesses and even most SEO professionals haven't heard of it.
• Default CMS settings block AI crawlers. Many website builders have default robots.txt settings that accidentally block AI bots.

The silver lining is that low average scores mean there's a massive first-mover advantage. The businesses that fix these issues now will dominate AI recommendations before their competitors even realize they need to.

How Sigma Agents Applies This

Sigma Agents runs a comprehensive 30+ signal audit across all three categories — traditional SEO, Local SEO, and AEO/GEO — and then builds a prioritized implementation roadmap. We do not just identify issues; we fix them. From implementing comprehensive schema markup and deploying llms.txt files to correcting NAP inconsistencies and configuring AI crawler access, our team handles the technical work so you can focus on running your business.

After implementation, we provide ongoing monitoring to track your AI visibility improvements and catch new issues as they emerge. Clients who complete the full audit-to-implementation cycle typically move from below-average AI readiness scores to top-tier performance in their local market, resulting in measurable increases in both organic traffic and AI-driven customer inquiries.

Frequently Asked Questions

How often should I run an AI visibility audit?

We recommend running an audit at least quarterly. AI search is evolving rapidly, and new signals and requirements emerge regularly. Running audits quarterly helps you catch issues early and stay ahead of changes.

Is the Sigma Agents audit really free?

Yes, completely. Our AI visibility scanis free with no strings attached. We offer it because we believe every business owner deserves to know where they stand. If you want professional help implementing fixes, we're here for that too—but there's no obligation.

Can I fix the issues myself?

Some issues are straightforward (updating robots.txt, adding basic meta descriptions), while others require technical expertise (implementing structured data, creating an llms.txt file, building comprehensive schema markup). Our audit report tells you what needs fixing; how you fix it is up to you. We're available to help if you need us.

What makes Sigma Agents' audit different from a regular SEO audit?

Most SEO audits only check traditional ranking factors. Our audit goes further by evaluating AI-specific signals like llms.txt presence, AI crawler access, structured data depth, entity consistency, and AI-ready content structure. These are the signals that determine whether you show up in ChatGPT, Perplexity, and Google AI Overviews—not just traditional Google search results.