> For the complete documentation index, see [llms.txt](https://docs.relevant-digital.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.relevant-digital.com/technical/integration/javascript-api/relevantdigital.addprebidconfig.md).

# relevantDigital.addPrebidConfig()

Use `relevantDigital.addPrebidConfig()` to add Prebid configuration. The library calls [pbjs.setConfig()](https://docs.prebid.org/dev-docs/publisher-api-reference/setConfig.html) before the first Prebid auction.

Your settings are merged into the configuration passed to `pbjs.setConfig()`.

{% hint style="warning" %}
Do not call `pbjs.setConfig()` directly. Direct configuration can cause unexpected behavior.
{% endhint %}

### When to call it

Call `relevantDigital.addPrebidConfig()` before the first [relevantDigital.loadPrebid()](/technical/integration/javascript-api/relevantdigital.loadprebid.md) call that includes Prebid placements.

Calls made later have no effect. They are safe, but do not update the existing Prebid configuration.

### Example

```
window.relevantDigital = window.relevantDigital || {};
relevantDigital.cmd = relevantDigital.cmd || [];
relevantDigital.cmd.push(function() {
   relevantDigital.addPrebidConfig({ // merge some prebid config
      ortb2: {
          site: {
              keywords: "relevant, yield",
          },
      },    
   });
   relevantDigital.loadPrebid({ ... }); // load some ads
})
```


---

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