As Facebook and Apple are combating the user's privacy war, all tracking events related to Pixel have been messed up. Some of the event data is probably missing and blocked from IOS devices, which counts for 26.46% of all mobile devices and 42.24% of all operating systems (1). That is a huge gap in the data analysis if advertisers want to run marketing campaigns and optimize later. So Facebook has developed the Conversion API for tracking conversion more precisely on Apple devices. It enables the servers side of your websites/e-commerce stores to send the data for tracking.

96% of US users and 88% of global users opt-out of app tracking in iOS 14.5 is totally not good news for Facebook advertisers. There is a fact that deactivating tracking doesn't mean we won't be disturbed by ads, we still see ads as much as before, the only difference is that we will be seeing more non-related ads than before. However, it still raises two main problems: 

• Conversion Tracking will be under-reported  
• Ads distribution or ad personalization will be impacted and experience some limitations. 

In this article, you will find out some actions to deal with them, at least at this point.