Insider on Thursday, April 29, reported (paywall) Facebook has sent a memo to some advertisers about the impact of the iOS 14.5 update for iPhone users on ad campaigns. 

The update will feature the App Tracking Transparency feature which gives the user an easier way of stopping apps and websites from tracking their online activities. The company said that advertisers should expect some fluctuation in ad campaign results as the update rolls out in the coming weeks. 

Why you should update your iPhone to iOS 14.5

Facebook said it will lose the ability to target ads in an estimated time frame for iOS users; the loss of a few click-through (users clicking on an ad after seeing it) and view-through (users continuing to look at an ad without interacting with it) metrics for iOS 14.5 users who have opted out of tracking; and the loss of the ability to target iOS 14.5 users with app install campaigns.

Facebook and Apple have feuded over the privacy changes in iOS 14.5, with Facebook claiming that it will negatively affect small businesses, and Apple doubling down on bolstering its current reputation as the most privacy-focused company among the tech giants. – Rappler.com