This promoted content is produced by a member of The Drum Network. The Drum Network is a paid-for membership product which allows agencies to share their news, opinion and insights with The Drum's audience. Find out more on The Drum Network homepage. S3 Advertising on how Apple’s latest iOS 14.5 privacy update could affect agency-run PPC campaigns On April 27 2021, Apple released its iOS 14.5 update, ushering in a new swathe of defaults for internet privacy that are set to have an impact on the way digital advertisers can operate and track the user. The changes will give users the ability to choose to block the sharing of unique identifiers (the things that track what you’re seeing and doing online) at App level, which impacts the level of marketing information users give to apps that serve people ads – like Facebook and Instagram.