Apple's iOS 27 Update Blocks Adtech Domains, Disrupting Web Advertising

Key points

• Apple's iOS 27 update blocks adtech domains in WebKit, affecting Safari and other browsers on iPhone and iPad.
• The block prevents companies like The Trade Desk, ID5, LiveRamp, Permutive, and Audigent from serving ads or using alternative identifiers.
• Apple has partially addressed the issue for The Trade Desk in a beta release, but the broader block on identity providers remains.
• The update has raised concerns about Apple's opaque and potentially aggressive approach to privacy, which some argue undermines the open web and benefits Apple's own ad business.

Background

This development follows Apple's long-standing privacy-first stance, including its 2017 Intelligent Tracking Prevention feature and 2022 App Tracking Transparency changes, which significantly impacted the adtech industry. Apple has also recently introduced ads in Apple Maps and AI-enabled listening features on the Apple Watch, further expanding its ad business and raising privacy concerns.

How outlets are covering it

Business Insider highlights the disruption to the adtech industry and the potential impact on advertisers and publishers. Digiday emphasizes the opacity of Apple's blocklist and the potential for dynamic updates, while PPC Land provides technical details on the WebKit changes and the ongoing bug report. Mediashotz focuses on the reactions of adtech leaders to the block.

Why it matters

Apple's move has significant implications for the digital advertising industry, potentially shifting marketing dollars away from the open web and toward platforms with vast stores of first-party user data. It also raises questions about Apple's role in policing the internet and the balance between privacy and advertising.

What to watch

The next steps include the release of iOS 27.2, which is expected to include a fix for The Trade Desk's ad-serving domain. However, the broader block on identity providers remains, and Apple has not indicated when or if it will address this issue. The adtech industry is expected to continue adapting to Apple's restrictions, potentially through server-side pixels and other workarounds.