iOS Tracking Transparency (ATT) is an Apple framework that requires apps to ask for user permission before tracking their activity across other apps and websites. Introduced with iOS 14.5, it presents a clear prompt allowing users to "Ask App Not to Track" or "Allow." This significantly impacts ads by making personalized advertising and targeted ads much less effective, as a vast majority of users choose not to grant permission to access their Identifier for Advertisers (IDFA). Consequently, advertisers face substantial challenges in measuring campaign performance and attributing conversions accurately, leading to a decrease in return on ad spend (ROAS) visibility. Many ad platforms have adapted by relying more on aggregated, privacy-preserving data and contextual advertising methods to target audiences. More details: https://t.me/s/lifeinfohubde