> For the complete documentation index, see [llms.txt](https://docs.usereach.ai/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.usereach.ai/understand-your-visibility/ai-visibility.md). # AI visibility concepts Reach measures how a brand appears when AI engines answer the questions its audience asks. ## Prompt A prompt is a question monitored across one or more AI engines. Good prompts describe a real user need, comparison, problem, or buying decision. ## Mention A mention occurs when an AI response names your brand. Mentions indicate brand awareness in the answer, but do not necessarily mean the response links to your website. ## Citation A citation occurs when an AI response uses one of your pages as a source. A citation may appear with or without a brand mention. ## Visibility Visibility is the share of monitored responses in which the brand appears. Always interpret it together with the selected date range, AI engines, prompts, and market. Visibility can change because the responses changed, the monitored prompt set changed, or filters selected a different slice of data. ## Citation rate Citation rate describes how often your domain is cited across the monitored responses. It helps distinguish brand recognition from content authority. ## Ghost citation A ghost citation happens when an AI engine cites your page but recommends or names another brand. These results show that your content has authority even though the brand is not receiving the full benefit. ## Sentiment and positioning Reach analyses how brands are described and which competitors appear in the same answers. Sentiment is a directional interpretation of response language, not a customer satisfaction score. ## Reading changes over time Avoid judging performance from a single response or day. AI answers vary, and different engines can produce different results for the same prompt. Use trends, prompt-level details, and response evidence together before deciding what changed. --- # Agent Instructions This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com. ## Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter, and the optional `goal` query parameter: ``` GET https://docs.usereach.ai/understand-your-visibility/ai-visibility.md?ask=&goal= ``` `ask` is the immediate question: it should be specific, self-contained, and written in natural language. `goal` is optional and describes the broader end goal you are ultimately trying to accomplish on behalf of the user. GitBook uses it to tailor the answer towards what is most useful for that goal. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.