Generative engine optimization (GEO) is the work that gets your business named and linked in AI answers, and to beat a competitor there you first beat them in ordinary search results, then make sure AI crawlers can read your site, your business facts match everywhere and other sites mention you. In 2026 Google's AI Mode passed one billion monthly users and site owners got the first official reports on AI answers. This guide shows what changed, how to measure where a competitor is cited and you are not, and the order of work for 2027.
What changed in AI search before 2027
Google published its own guidance on AI search, gave site owners a report and an opt-out control, and its AI products reached billions of users. Each line below is from the company's own announcement or documentation.
| Date | Change | Source |
|---|---|---|
| 10 Feb 2026 | AI Performance report in Bing Webmaster Tools, public preview: how often Copilot and Bing AI summaries cite your pages | Bing Webmaster blog |
| 15 May 2026 | Guide to optimizing for generative AI features in Google Search | Google Search Central |
| 19 May 2026 | AI Mode passed one billion monthly users; queries more than doubled every quarter since launch | Google Search at I/O 2026 |
| 3 Jun 2026; all websites by 31 Aug 2026 | Generative AI performance report and the Search generative AI control in Search Console; AI Overviews at over 2.5 billion monthly active users; Preferred Sources in AI Overviews and AI Mode | Google blog |
| 16 Jun 2026 | Bing adds Citation Share, Intents, Topics and Compare to AI Performance (preview) | Bing Search blog |
| 11 Aug 2026 | Gemini app passed one billion monthly users | Google blog |
| 24 Sep 2026 | Multimodal filter (Google Lens, Circle to Search) in the Performance and Generative AI reports | Search Central blog |
| 28 Oct 2026 | AI Mode queries are three times longer than traditional searches on average; one in five AI Mode searches uses voice, images or documents | Alphabet Q3 2026 remarks |
| 30 Oct 2026 | Google plans a shared AI training control in robots.txt, based on IETF AIPREF work, together with other AI providers in 2027 | Search Central blog |
Research on user behaviour explains why being cited matters more than being ranked below the answer. The Pew Research Center study of 22 July 2025 (900 U.S. adults, 68,879 searches) found that users clicked a traditional result in 8% of visits when an AI summary appeared and in 15% without one; links inside the summary got clicks in 1% of visits. For 2027 this means the business named inside the answer gets the attention, and longer, more specific questions give a competitor with better pages more chances to be that business.
What Google says about llms.txt, chunking and special markup
Google's AI features documentation states: "There are no additional requirements to appear in AI Overviews or AI Mode, nor other special optimizations necessary." The May 2026 guide adds four points:
- llms.txt: "Google Search itself doesn't use them." Keeping the file for other services is fine. mmix.biz publishes one for AI agents and other tools, and we treat it as optional.
- Chunking: there is no requirement to split content into small pieces, and no ideal page length.
- Markup: there is no special schema.org markup for AI features. Structured data still has to match the visible text, and it keeps pages eligible for rich results.
- Mentions: "seeking inauthentic 'mentions' across the web isn't as helpful as it might seem." Google's AI features rely on the same ranking and spam systems as Search.
Outside Google the rules are set by each company. OpenAI's crawler documentation says sites that opt out of OAI-SearchBot will not be shown in ChatGPT search answers and can only appear as navigational links; it recommends allowing OAI-SearchBot and OpenAI's published IP ranges. GPTBot, the training crawler, is a separate setting, and robots.txt changes take about 24 hours to apply.
How to measure the gap with a competitor in AI answers
A gap counts when an AI answer to a question your buyers ask names or links the competitor and leaves you out. The right column holds the working rules we use in audits.
| What to compare | Where it is visible | Count it as a gap when |
|---|---|---|
| Appearances in AI Overviews and AI Mode | Search Console → Generative AI performance (your impressions by page and country); the same service queries in AI Mode from your city (both) | They are named or linked for a service query where you rank in the top 10 and are absent from the answer |
| ChatGPT search answers | Answers and source lists for your service questions; referrals tagged utm_source=chatgpt.com in analytics | ChatGPT recommends them for "best [service] in [city]" and leaves you out |
| Perplexity and Copilot | Perplexity's source list; Bing Webmaster Tools → AI Performance (citations and Citation Share per grounding query for your site) | Their pages are among the sources and yours are absent, or your Citation Share is falling |
| Crawler access | robots.txt, CDN and firewall rules for Googlebot, Bingbot, OAI-SearchBot and PerplexityBot; Search Console → Settings → Search generative AI | Any search crawler blocked, or the site excluded from Google's generative AI features |
| Consistency of business facts | Your site, Google Business Profile, directories, social profiles | Name, address, phone, hours or service list differ between sources |
| Mentions on other sites | Local media, industry associations, "best of" lists, review platforms that AI answers cite | They appear on sources that AI answers cite for your category and you do not |
| Reviews | Google Business Profile, industry review platforms | More recent reviews that describe the service in the buyer's words |
| Pages that answer long questions | Their service pages and yours side by side | They state price factors, area, timelines and credentials; your page lists the service name only |
Bing's Citation Share shows your share of citations for a query and keeps competitor domains hidden, so the competitor side always comes from running the questions yourself on a fixed list and date. Use the same 20 to 30 questions every month, from the same location, and log who is named.
What to do to get cited ahead of the competitor
Work in this order: access, facts, pages, mentions, then measurement. Each step is part of our promotion in AI search and LLM systems; the ranking work it depends on is covered in how to outrank competitors in Google SEO in 2027.
1. Open access for search crawlers
Allow Googlebot, Bingbot, OAI-SearchBot and PerplexityBot in robots.txt and at the CDN or firewall level, where bot protection rules can block them without notice. Check that the site is included under Search generative AI in Search Console. Decide on AI training separately: Google-Extended and GPTBot govern training and have no effect on Google Search. Google's plan for a shared AI training control and the current options are covered in our post on AI training control in robots.txt.
2. Make the business facts identical everywhere
Use one legal and trading name, one address format, one phone number and the same list of services on the site, Google Business Profile, directories and social profiles. Put the facts AI answers quote on the About and Contacts pages in plain text: founding year, location, areas served, licences, people. Organization or LocalBusiness markup should repeat exactly what the page shows. For local businesses, Google's guide says a Google Business Profile can help your services be visible in both AI responses and other Search results; our local SEO and Google Maps guide covers the profile.
3. Publish what only you can say
Google's guide asks for "non-commodity" content: first-hand experience and expert detail beyond common knowledge. On a service page this means factors that change your price, what a typical project includes, the areas you serve, your process and real photos. Google also says AI features can bring in relevant images and video, which gives a page more places to appear; our video index case shows how we bring video into Google's results.
4. Earn mentions where AI answers look
Find the sources AI answers cite for your category in your city: local media, associations, comparison lists, review platforms. Earn a place there through real activity: an expert comment, a sponsorship, a membership, a partner page. In the Ahrefs study of 75,000 brands (May 2025), branded web mentions correlated with visibility in AI Overviews at 0.664 and backlinks at 0.218; Ahrefs notes that correlation is not causation. Bought or fake mentions fall under Google's spam policies. Reviews belong in the same step: our reputation management guide describes the process.
5. Measure every month
Track impressions in Search Console's Generative AI report, citations in Bing AI Performance, ChatGPT referrals in analytics and the monthly question log for you and the competitor. The AI search optimization overview explains how each AI system finds sources.
Why hand this work to a team under contract
- Access mistakes go unnoticed without checks. A CDN rule that blocks OAI-SearchBot removes the site from ChatGPT answers, and the Search Console exclusion removes traffic and impressions from Google's AI features. Both need regular checks.
- Mention campaigns carry spam risk. Google says inauthentic mentions are less helpful than they might seem, and its AI features rely on the same spam systems as Search.
- Markup has to match the page. Mismatched structured data costs rich result eligibility.
- Results are reported in writing. A contract fixes the question list, the platforms checked and the monthly report.
- Marketing MIX has worked since 2012. The studio is at 208 Booth Street, Ottawa, and works in Canada, Ukraine, Germany and France; the portfolio holds 126 documented projects.
AI search is one of the channels in the yearly plan; the others are in what to bring into 2027: marketing, business growth and investment.