api-docs/docs/node-tracker/markdown/node-tracker.adimpressionevent.bannerid.md
<!-- Do not edit this file. It is automatically generated by API Documenter. -->
[Home](./index.md) > [@snowplow/node-tracker](./node-tracker.md) > [AdImpressionEvent](./node-tracker.adimpressionevent.md) > [bannerId](./node-tracker.adimpressionevent.bannerid.md)
## AdImpressionEvent.bannerId property
Identifier for the ad banner being displayed
<b>Signature:</b>
```typescript
bannerId?: string;
```