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

# How link indexing works

> Control whether search engines can index your Biqli short links.

Search engines can discover any public URL they can crawl. Biqli keeps short-link SEO conservative by sending a `noindex` response header unless you turn on search engine indexing for a specific link.

This is especially useful when you use a custom domain or subdomain, such as `go.example.com`. It helps keep campaign redirects, private offers, and tracking links out of search results.

```bash theme={null}
GET /github HTTP/2
Host: biq.li

HTTP/2 301
location: https://github.com
X-Robots-Tag: noindex
X-Powered-By: Biqli
```

<Info>
  The `noindex` header applies to short links by default. Your regular marketing,
  legal, and product pages can still appear in your sitemap.
</Info>

## Enable indexing for a short link

Use search engine indexing only when the short URL itself should be discoverable in Google and other search engines.

1. Open your Biqli dashboard.
2. Create or edit a short link.
3. Find **Custom Link Preview**.
4. Turn on **Search Engine Indexing**.
5. Click **Create** or **Update**.

<Frame>
  <img src="https://mintcdn.com/biqlillc-cc349ea4/Y1LdbUkeK5vmC4ey/images/link-indexing/search-engine-indexing.png?fit=max&auto=format&n=Y1LdbUkeK5vmC4ey&q=85&s=2df2059af0ddcaa1be32aaf101b72be5" alt="Search engine indexing option in the Biqli link builder" width="1319" height="299" data-path="images/link-indexing/search-engine-indexing.png" />
</Frame>

When indexing is enabled, Biqli serves the short link without the `noindex` header:

```bash theme={null}
GET /github HTTP/2
Host: biq.li

HTTP/2 301
location: https://github.com
X-Powered-By: Biqli
```

## Sitemap behavior

Biqli can include opted-in short links in generated sitemap files. Disabled links, password-protected links, future-scheduled links, and expired links are excluded.

<Tip>
  Leave indexing off for most campaign redirects. Turn it on for evergreen,
  branded, or public links that deserve their own search result.
</Tip>