Facebook continues to warn advertisers about the effects of the privacy and tracking changes that Apple has planned for iOS 14. While a pair of earlier reports indicated Facebook’s concerns, the company has now published a blog post detailing how advertisers will be affected by iOS 14’s new anti-tracking features.

In the blog post, Facebook explains that it and many advertising partners rely on the Identifier for Advertisers (IDFA) feature. This is what allows advertisers to track users across different apps and websites. With iOS 14, however, Apple is adding a new privacy protection such that developers will be required to ask for permission before tracking a user across apps or websites.

Facebook now says that it will not collect IDFA through its own apps on iOS 14 devices because of the changes to Apple’s policy. The company says that this is not a change it wants to make, but one that is “forced” by Apple’s iOS 14 changes and one that will have a drastic effect on its Audience Network ad platform for developers.

For developers and publishers using Audience Network, our ability to deliver targeted ads on iOS 14 will be limited. As a result, some iOS 14 users may not see any ads from Audience Network, while others may still see ads from us, but they’ll be less relevant. Because of advertisers’ reduced ability to accurately target and measure their campaigns, app developers and publishers should expect lower CPMs on Audience Network and likely other ad networks on iOS.

Facebook’s focus isn’t necessarily on how its own advertising business will be affected, but rather on the businesses that could be affected by a drastic change in Audience Network effectiveness. In testing so far, Facebook says that it has seen more than a 50% drop in Audience Network publisher revenue when personalization was removed from mobile ad install campaigns:

We expect these changes will disproportionately affect Audience Network given its heavy dependence on app advertising. Like all ad networks on iOS 14, advertiser ability to accurately target and measure their campaigns on Audience Network will be impacted, and as a result publishers should expect their ability to effectively monetize on Audience Network to decrease. Ultimately, despite our best efforts, Apple’s updates may render Audience Network so ineffective on iOS 14 that it may not make sense to offer it on iOS 14.

Facebook even points out that it expects “less impact” on its own advertising business, likely because it has such detailed profile information already on Facebook and Instagram users. “We understand that iOS 14 will hurt many of our developers and publishers at an already difficult time for businesses,” Facebook added in the blog post.

Going forward, Facebook said that it believes “industry consultation is critical for changes to platform policies, as these updates have a far-reaching impact on the developer ecosystem.” The company says that it is “encouraged by conversations and efforts already taking place in the industry.”

You can read more in the Facebook for Business blog post here and in the Facebook Audience Network blog post here.

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About the Author

Chance Miller

Chance is an editor for the entire 9to5 network and covers the latest Apple news for 9to5Mac.

Tips, questions, typos to chance@9to5mac.com