# Understand GEO, AEO, LLMO, and AI search visibility

> Learn what the main AI-search terms mean, what CallUltra publishes for discovery, and how to measure visibility without exposing private account data.

Reviewed: 2026-09-30

Source: https://docs.callultra.com/documentation/ai-search

## The terms in plain language

| Term | Meaning | What it changes |
| --- | --- | --- |
| GEO | Generative Engine Optimization: improving useful public content so generative search systems can understand it and may cite it in an answer. | Clear facts, original evidence, crawlable pages, descriptive headings, and trustworthy sources. |
| AEO | Answer Engine Optimization: structuring content so a search engine, voice assistant, or AI engine can extract and display or speak a direct, accurate answer. | Question-led headings, concise answers, definitions, lists, tables, and matching structured data where a supported type exists. |
| AIO / LLMO | AI Optimization or Large Language Model Optimization: broad labels for helping language-model products recognize, retrieve, and accurately describe a brand. | Consistent product facts, accessible text, strong entity signals, reputable third-party coverage, and current documentation. |
| Brand Radar | Ahrefs Brand Radar is an external visibility-measurement product, not an optimization standard and not a built-in CallUltra feature. | Tracks modeled prompts, mentions, citations, impressions, and AI share of voice so teams can compare trends. |
| AI Overviews | Google's generative summaries that can appear in Search and link to supporting web pages. | Uses the same core crawl, index, quality, and snippet eligibility foundations as Google Search; there is no special AI Overview schema. |

## What the CallUltra docs publish

Every public guide is delivered as readable HTML in the first response, with a unique title, description, canonical URL, crawlable internal links, and matching article metadata. The build also publishes a sitemap, a Markdown alternative for each guide, and optional `llms.txt` indexes for tools that choose to use them.

> **Useful, not guaranteed:** These signals make the documentation easier to discover and quote. Google says its Search systems ignore llms.txt for ranking and do not require special AI schema. Other tools may choose to use these files. No file, schema, or wording can guarantee an AI citation, recommendation, or ranking.

## Write pages that answer real questions

1. **Choose one user task** — Start with a question a buyer, operator, or developer genuinely needs answered.
2. **Answer it early** — Give the direct answer near the heading, then add constraints, evidence, and steps.
3. **Use verifiable product facts** — Name the feature, supported workflow, limitation, and source. Remove claims the product cannot prove.
4. **Connect related evidence** — Link to the relevant guide, API operation, security explanation, screenshot, or independent source.
5. **Review and refresh** — Update changed capabilities and dates, then remove obsolete or contradictory statements.

## Measure AI visibility responsibly

Track a stable set of prompts that reflect real customer questions, then record whether CallUltra is mentioned, cited, described accurately, and linked. Compare trends by engine and geography instead of treating one generated answer as a ranking.

| Signal | What to record |
| --- | --- |
| Mentions | Whether CallUltra appears in the generated answer. |
| Citations | Which CallUltra or third-party URL supports the answer. |
| Accuracy | Whether the product description and limitations are correct. |
| Share of voice | How often CallUltra appears compared with a defined competitor set. |
| Referral traffic | Visits and conversions attributed to AI-search links where analytics data is available. |

Ahrefs Brand Radar can provide one external view of mentions and citations. Search Console, Bing Webmaster Tools, server logs, and analytics provide separate evidence about crawling, indexing, referrals, and conversions.

## Keep public discovery separate from private data

-   Only public marketing pages and documentation should be crawlable. Call records, transcripts, recordings, leads, billing data, and account settings must remain behind authentication and authorization.
-   Never place API keys, MCP grants, webhook secrets, private prompts, customer phone numbers, or credentials in public HTML, Markdown, screenshots, structured data, sitemaps, or `llms.txt`.
-   Use authentication for confidential content. A `robots.txt` rule is crawler guidance, not an access-control mechanism.
-   Keep Markdown alternatives and AI index files out of traditional search results when the canonical HTML page should rank, reducing duplicate URLs.
-   Do not create thin, duplicated, or machine-generated pages only to manipulate AI answers. Publish original material that helps a person complete a task.

> **CallUltra's boundary:** The docs domain contains public guidance only. Product actions and tenant data stay on the authenticated application domain and remain subject to CallUltra permissions.

## Understand crawler controls

The docs site's `robots.txt` permits public crawling. Crawlers can use different names for search retrieval, user-triggered fetching, and model training; one publisher setting may not control all of them. Review each provider's current crawler documentation if you need different rules for discovery and training.

Robots directives are voluntary crawler instructions. They do not authenticate visitors or prevent an uncooperative scraper from requesting a public page. Keep confidential information off this public domain and enforce product access in the application itself.

## What not to claim

Do not describe GEO, AEO, AIO, or LLMO as a guaranteed ranking system. Do not present Brand Radar as a CallUltra capability unless a separate integration is actually built and verified. Do not claim inclusion in Google AI Overviews, ChatGPT, Claude, Gemini, Perplexity, or another assistant without dated evidence from that service.

## Authoritative references

-   [Google: AI features and your website](https://developers.google.com/search/docs/appearance/ai-features) explains eligibility for AI Overviews and AI Mode.
-   [Google's generative AI optimization guide](https://developers.google.com/search/docs/fundamentals/ai-optimization-guide) explains why standard search fundamentals still apply.
-   [OpenAI's publisher and developer FAQ](https://help.openai.com/en/articles/12627856-publishers-and-developers-faq) explains ChatGPT search discovery and crawler controls.
-   [Anthropic's crawler guide](https://support.anthropic.com/en/articles/8896518-does-anthropic-crawl-data-from-the-web-and-how-can-site-owners-block-the-crawler) documents its crawler controls.
-   [Perplexity's crawler documentation](https://docs.perplexity.ai/docs/resources/perplexity-crawlers) lists its crawler identities and robots behavior.
-   [Ahrefs: What is Brand Radar?](https://help.ahrefs.com/en/articles/11064852-what-is-brand-radar-and-how-to-use-it) describes the external measurement product.
-   [Google's content-control guide](https://developers.google.com/search/docs/crawling-indexing/control-what-you-share) explains why confidential content needs access control rather than crawler directives alone.