The good news is that the situation isn’t hopeless and there are still several options for creating custom audiences. Here are some best practices:
Make the most of first-party and zero-source data.
The information your potential customers share directly with you, with its explicit content, is a powerful resource. Not only is it unaffected by the latest iOS update, but first-party and zero-source data is often more reliable and accurate than other types of data.
Target a larger audience
Larger custom audiences often perform better than smaller ones in the post-iOS 14.5 world.
Less reliance on web audiences
Which are less useful after the iOS update, and recent mobile phone number data focus more on the audiences you build in-app on Facebook and Instagram.
Create a custom audience from a customer list
Create a customer updates and custom audiences list and save it in CSV or TXT format
Select “Customer List” as the custom audience sault data source so Facebook knows where your data is coming from.