# What is AI visibility score?

An AI visibility score is a number that summarizes how often AI assistants such as ChatGPT, Perplexity and Gemini name a brand when they answer questions in its category.

[Start free](https://limelit.co/signup)

Limelit measures Visibility on every account, including the free one; it only counts runs that produced an answer, so a window with no measured runs shows as not measured.

## Definition

An AI visibility score is a number that summarizes how often AI assistants such as ChatGPT, Perplexity and Gemini name a brand when they answer questions in its category. In Limelit the score is called Visibility: How often AI assistants mention this brand: the share of your tracked prompt answers (across engines) that name it. Higher is better. It is computed as (runs mentioning the brand / measured runs) x 100.

```
(runs mentioning the brand / measured runs) x 100
```

## More terms

- [AI share of voice](https://limelit.co/glossary/ai-share-of-voice)
- [AI search monitoring](https://limelit.co/glossary/ai-search-monitoring)
- [llms.txt](https://limelit.co/glossary/llms-txt)
- [AI citation](https://limelit.co/glossary/ai-citation)
- [The full glossary](https://limelit.co/glossary)

Questions

## The things people ask us first.

### Is an AI visibility score the same in every tool?

No. Each tool picks its own prompts, engines and counting rules, so two scores are comparable only when the prompt set and engines match.

### What counts as a measured run?

One tracked prompt answered by one engine on one day. A query for which Google showed no AI Overview is excluded, because it says nothing about the brand.

### Can the score be 0% when nothing was measured?

No. With zero measured runs Limelit shows the score as not measured, never as 0.0%, so an empty window is not mistaken for a brand no engine names.

### Does a higher visibility score mean more traffic?

Not by itself. It measures how often answers name you; clicks depend on whether the answer links to you, which the citation numbers and the GA4 referral report show separately.