What Is Generative Engine Optimization (GEO)? A Research-Based Guide

Generative engine optimization, or GEO, is the work of making a business and its information easier for AI search systems to find, understand and reference. That can include clearer service pages, accurate business details, original evidence and sensible crawler controls.

It does not give a business control over an AI answer. A readable page can still go uncited. A brand mention can arrive without a link, and a link can arrive without a customer.

To put something measurable behind the advice, we audited 18 plumbing and HVAC business homepages across New England on September 20, 2026. We looked at the HTML and robots files those sites returned. We did not ask AI systems to recommend the businesses, so these findings describe website implementation, not citation performance.

GEO vs. SEO: how do they relate?

SEO helps relevant customers find your pages through unpaid search results. Generative engine optimization focuses on how a business and its information appear in AI-generated answers, including brand mentions and source citations. The work overlaps: both benefit from accessible pages, accurate information and evidence that answers a customer’s question.

The measurement differs. Search impressions and clicks describe search activity; a GEO prompt panel describes the answers collected under its recorded conditions. Neither tells you how many qualified customers contacted the business without additional tracking.

Original GEO research: what 18 business homepages revealed

We selected three businesses per state, using public business searches and service-area checks. This is a small convenience sample, not a representative survey of New England companies.

The observations CSV lists the businesses and measurements. Our methodology defines every field and explains the limits.

Two distinctions matter here. First, having some JSON-LD is different from providing structured business details: only nine of the fourteen pages with JSON-LD contained one of the local business types we checked. Second, an explicit crawler group can contain either permission or restrictions. The other fifteen sites were not necessarily blocking AI bots; wildcard rules may apply.

These are useful audit questions. They are not a GEO score or evidence that one site performs better than another.

GEO starts with accessible, useful pages

For Google's AI search features, ordinary search fundamentals still matter. Google's AI optimization guide says supporting pages need to be indexed and eligible to appear with a snippet. It does not require a special AI schema or an llms.txt file.

Start with the information a customer needs to choose you: the work you actually do, the area you serve, the limits of your service, relevant experience and how to contact you. Put those facts on the appropriate page. A boilerplate sentence about being the “best” provider does little to resolve a specific customer question.

For a plumbing business, that might mean explaining whether you repair or replace a particular water heater, what determines the quote, and whether you serve the customer's town. Use actual job records or documented policies when adding numbers. Do not invent an average repair price just to give an AI something to quote.

Our SEO basics guide covers the website work that supports this.

Search access and model training are separate choices

OpenAI distinguishes OAI-SearchBot, used for search, from GPTBot, used for foundation-model training. Its crawler documentation says those settings are independent. Allowing search access does not require allowing training access.

That makes “unblock all AI bots” an unhelpfully broad instruction. Review the purpose of each crawler, then decide which access you want. Check the relevant robots rules and your hosting or firewall controls. A successful request from our research crawler does not prove OpenAI can fetch the same page.

Only two sampled robots files explicitly named OAI-SearchBot. That is a reason to inspect configuration carefully, not evidence that sixteen businesses need to add the same rule.

Make answers clear without writing to a formula

Nine sampled homepages had a question-mark heading. That tells us something about their markup, but nothing about whether the answer underneath was accurate or useful.

Use questions when customers actually ask them. Answer directly, then explain qualifications. A service page can be clear without turning every heading into a question or forcing every paragraph to the same length.

There is also a current distinction between helpful FAQ content and search presentation. Google now documents the removal of the FAQ rich result feature. Adding FAQPage markup should not be sold as a way to obtain a Google FAQ rich result. It also does not establish that ChatGPT will cite the answer.

How to measure generative engine optimization

A sensible GEO review separates whether your brand appeared in a saved answer, whether your website was cited, whether someone visited, and whether the visit led to a qualified inquiry. Those are different events.

Keep a stable set of customer questions and save the returned answers with dates, locations and engine names. Describe the result as visibility within that sample. Avoid translating a sampled mention rate into a percentage of all AI users.

Our guide to tracking ChatGPT brand mentions explains the recording process and monitoring budget. If you need help making the underlying pages clearer, contact Lookelo with the service page and customer question you want to improve.

A practical starting point for an independent store

Choose a customer question your website should answer, such as whether a paint is suitable for a particular surface or how a customer can arrange pickup. Find the page that should answer it and check the facts with the person who knows that department.

Work through a short sequence:

1. Confirm that the relevant page is accessible and that its content explains the product or service clearly.
2. Correct conflicting store details and support factual claims with information your team can verify.
3. Make the next step clear: browse the range, ask about availability, or contact the store.
4. Record the change and review the same customer questions over time, keeping mentions, citations, visits, and enquiries separate.

This turns the broader GEO checklist into a manageable piece of website work. It is not a promise that an assistant will recommend the store. For different page types, see our GEO content playbooks.