---
title: SKStoreProductParameterProductIdentifier
framework: storekit
role: symbol
role_heading: Global Variable
path: storekit/skstoreproductparameterproductidentifier
---

# SKStoreProductParameterProductIdentifier

The key representing the product identifier for the promoted product you want the store to display at the top of the page.

## Declaration

```swift
let SKStoreProductParameterProductIdentifier: String
```

## Discussion

Discussion The value for this key is an instance of NSString. When your app uses an SKStoreProductViewController to render an app page for another app, you can optionally choose to highlight an in-app purchase by displaying it at the top of the store page.  Set  SKStoreProductParameterProductIdentifier to the identifier of the product you want displayed at the top of the page. The product indicated by the identifier must be set up as a promoted product in the App Store, otherwise the identifier is ignored. See Promoting In-App Purchases. note: Use the same product identifiers as used in the productIdentifier variable in the SKProduct class.

## See Also

### Affiliate and Analytics Keys

- [SKStoreProductParameterAdvertisingPartnerToken](storekit/skstoreproductparameteradvertisingpartnertoken.md)
- [SKStoreProductParameterAffiliateToken](storekit/skstoreproductparameteraffiliatetoken.md)
- [SKStoreProductParameterCampaignToken](storekit/skstoreproductparametercampaigntoken.md)
- [SKStoreProductParameterProviderToken](storekit/skstoreproductparameterprovidertoken.md)
- [SKStoreProductParameterCustomProductPageIdentifier](storekit/skstoreproductparametercustomproductpageidentifier.md)