> ## Documentation Index
> Fetch the complete documentation index at: https://docs.growthmention.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Source score

> The share of AI answers that cite a page on your own website as a source.

**Source score is the share of answers that cite at least one page on your own website.** Where [brand visibility](/metrics/brand-visibility) tells you whether the assistants *talk about* you, source score tells you whether they *use* your site to build their answers.

## How it's calculated

```text theme={null}
Source score = answers citing a page on your domain ÷ all answers collected
```

It counts all answers, including those that name no brand: an answer can use your page without naming anyone. It's calculated for each assistant, then averaged with every assistant counting equally.

**Example.** Of ChatGPT's 150 answers in the last 28 days, 21 listed a page from *acme.com* among their sources: 14%. Of Perplexity's 50, 5 did: 10%. Your source score is **12%**.

<Frame>
  ![Source Score Over Time chart](https://growthmention.com/docs-img/dashboard-source-score-over-time.png)
</Frame>

## Which pages count as yours

A citation counts when it points to the **domain set on your project**, or any subdomain of it:

| Cited page                                                | Counts for *acme.com*?            |
| --------------------------------------------------------- | --------------------------------- |
| acme.com/pricing                                          | Yes                               |
| [www.acme.com/blog/guide](http://www.acme.com/blog/guide) | Yes                               |
| help.acme.com/setup                                       | Yes — a subdomain                 |
| notacme.com/review                                        | No — a different site             |
| g2.com/products/acme                                      | No — about you, but not your site |

<Note>
  Review sites and articles *about* you don't count towards source score, even though they help your visibility. To see every site the assistants cite — yours and everyone else's — open the [Sources](/guides/sources-and-citations) pages.
</Note>

## Why the two numbers differ

Visibility and source score aren't meant to match. It's common to be named often but rarely cited — the assistant has learned about you from other sites. It's also possible to be cited without being named, when an assistant uses your content to answer a general question.

A low source score next to a healthy visibility usually means your own pages aren't the ones the assistants reach for. [Agent Analytics](/agent-analytics/overview) shows whether their crawlers can read those pages at all.