# Aggregated Event Measurement and Limitations of SKAdsNetwork



Aggregated Event Measurement and limitations of SKAdsNetwork for iOS 14 and later devices.

## SKAdNetwork Limitations

For each Meta App ID, advertisers targeting iOS 14 and later device users can have 9 ad campaigns, spread across up to 9 ad accounts, and 5 ad sets.

### Ad Campaigns

* To create a SKAdNetwork campaign and promote an external app, you must follow these requirements:
    * The app being promoted must be an iTunes app — The `object_store_url` in `promoted_object` must point to an iTunes app.
    * The promoted object is required for SKAdNetwork or Aggregated Event Measurement campaigns.
    * The Ad Account used to create the campaign must have permission to advertise the app being promoted.
    * The app being promoted must have at least v8.0 of the Meta Business SDK. If you use a Mobile Measurement Partner SDK, make sure your SDK is also updated.
* You cannot create a SKAdNetwork campaign to promote an app if that app is already being promoted in another ad account.
* Once an SKAdNetwork Campaign is live, you cannot edit the promoted object or the SKAdNetwork flag.
* Your `buying_type` must always be `auction`.
* Bid strategy `TARGET_COST` is not available for [Campaign Budget Optimization](https://developers.facebook.com/docs/marketing-api/bidding/guides/campaign-budget-optimization) campaigns.
* Deferred Deep Linking is not available for new iOS14+ AKAdNetwork campaigns.
* You can't change the bundle ID, iPhone Store ID, or iPad Store ID for this app because one or more iOS 14+ campaigns are currently running.

### Ad Sets

* You must specify at least iOS 14 under `user_os`. If you provide an invalid value, you won’t be able to create the ad set.
* If the ad set is created using the default targeting string, we will filter the target devices based on if the ad set is eligible for iOS 14+ devices.
* Bid strategy `TARGET_COST` is not available.
* [Cost Per Action billing](https://developers.facebook.com/documentation/ads-commerce/marketing-api/bidding/guides/cost-per-action-ads) is not available. Specifically, `billing_event` and `optimization_goal` cannot be both set to `APP_INSTALLS`.
* You must specify the `campaign_attribution` field. If you want to use Meta's Aggregated Event Measurement, then set this field to `AEM`. If you want to use Apple's SKAdNetwork, then this field should be set to `SKADNETWORK`.

### Ads

* iOS 14 App Ads can only be created on ad sets under SKAdNetwork campaigns.

### Insights

Meta may no longer be able to aggregate non-inline conversion metric values across iOS 14 and non-iOS 14 campaigns due to differences in attribution logic. Querying across iOS 14 and non-iOS 14 campaigns will result in no data getting returned for non-inline conversion metrics (i.e. app installs, purchases). Inline event metrics like impressions, link clicks, and video views, however, can still be aggregated.

**Note:** Because iOS 14 campaigns rely on SKAdNetwork data and associated attribution logic, results for those campaigns can only be queried using the default or new unified attribution setting.

## Aggregated Event Measurement

Meta’s Aggregated Event Measurement is a protocol that allows for measurement of web and app events from people using iOS 14.5 or later devices. Aggregated Event Measurement currently limits domains and mobile apps to 8 conversion events that can be configured and prioritized for Aggregated Event Measurement.

Visit our [Domain Verification guide](https://developers.facebook.com/documentation/sharing/domain-verification) to verify your domain ownership for Aggregated Event Measurement.

## Learn More

* [Aggregated Event Measurement](https://www.facebook.com/business/help/721422165168355)
* [Event Priority](https://www.facebook.com/business/help/193250612476055)
* [Value Sets](https://www.facebook.com/business/help/378857770047703)
* [Value Optimization](https://www.facebook.com/business/help/296463804090290?id=561906377587030)
* [Eligibility Requirements for Value Optimization](https://www.facebook.com/business/help/571188993373447?id=561906377587030)
* [Set Up Value Optimization](https://www.facebook.com/business/help/437932930561569?id=561906377587030)