In 2021, TikTok is the hottest social media app with over 1 billion monthly active users. That is why most marketers decide to bring it into their advertising strategies. People use TikTok on their mobile phones more than anywhere else. For quite a while, only Facebook was talking about Apple’s recent privacy updates. Only this time, new iOS tracking restrictions will also apply to TikTok ads. Because of the iOS restriction, TikTok custom audiences and events do not include people who opted out of tracking in iOS 14.