> 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.getadunitinstancebybid.md).

# relevantDigital.getAdUnitInstanceByBid()

Use `relevantDigital.getAdUnitInstanceByBid()` to match a Prebid bid object to its Relevant Yield placement and ad slot.

Pass a bid from [pbjs.onEvent()](https://docs.prebid.org/dev-docs/publisher-api-reference/onEvent.html) or another Prebid API method.

### Return value

Returns an object with a `slot` property for the matching ad slot.

{% hint style="info" %}
For Google Ad Manager, `slot` may be a [googletag.Slot](https://developers.google.com/publisher-tag/reference#googletag.slot). For instream video, [delayedAdserverLoading](/technical/integration/javascript-api/relevantdigital.loadprebid.md), or other ad servers, it is a Relevant Yield object with a smaller API.
{% endhint %}

#### `slot.getSlotElementId()`

Returns the ad slot's div ID. For instream video, it returns the ID supplied to [relevantDigital.defineVideoSlots()](/technical/integration/javascript-api/relevantdigital.definevideoslots.md).

#### `slot.getAdUnitPath()`

Returns the ad unit path or placement ID.

### Parameters

#### `bid`

The bid object returned by Prebid. For example, use a bid from [pbjs.onEvent()](https://docs.prebid.org/dev-docs/publisher-api-reference/onEvent.html) or [pbjs.getBidResponses()](https://docs.prebid.org/dev-docs/publisher-api-reference/getBidResponses.html).

### Example

```
pbjs.onEvent('bidWon', (bid) => {
    const instance = relevantDigital.getAdUnitInstanceByBid(bid);
    const { slot } = instance;
    console.info('div id: ', slot.getSlotElementId());
    console.info('placement id: ', slot.getAdUnitPath());
});
```


---

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